1667403798480 has 400 divisors, whose sum is σ = 6662892297600. Its totient is φ = 378561475584.

The previous prime is 1667403798391. The next prime is 1667403798481. The reversal of 1667403798480 is 848973047661.

1667403798480 is a `hidden beast` number, since 1 + 6 + 6 + 7 + 403 + 79 + 84 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1667403798481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 6635287 + ... + 6881993.

It is an arithmetic number, because the mean of its divisors is an integer number (16657230744).

Almost surely, 2^{1667403798480} is an apocalyptic number.

1667403798480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1667403798480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3331446148800).

1667403798480 is an abundant number, since it is smaller than the sum of its proper divisors (4995488499120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1667403798480 is a wasteful number, since it uses less digits than its factorization.

1667403798480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246888 (or 246873 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 1667403798480 in words is "one trillion, six hundred sixty-seven billion, four hundred three million, seven hundred ninety-eight thousand, four hundred eighty".