1666058269680 has 320 divisors, whose sum is σ = 6574129228800. Its totient is φ = 379903011840.

The previous prime is 1666058269643. The next prime is 1666058269697. The reversal of 1666058269680 is 869628506661.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6203790 + ... + 6466770.

It is an arithmetic number, because the mean of its divisors is an integer number (20544153840).

Almost surely, 2^{1666058269680} is an apocalyptic number.

1666058269680 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 1666058269680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3287064614400).

1666058269680 is an abundant number, since it is smaller than the sum of its proper divisors (4908070959120).

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

1666058269680 is a wasteful number, since it uses less digits than its factorization.

1666058269680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263429 (or 263417 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 63.

The spelling of 1666058269680 in words is "one trillion, six hundred sixty-six billion, fifty-eight million, two hundred sixty-nine thousand, six hundred eighty".