667878362580 has 192 divisors, whose sum is σ = 2223465043968. Its totient is φ = 147654474240.

The previous prime is 667878362537. The next prime is 667878362597. The reversal of 667878362580 is 85263878766.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 243217 + ... + 1181063.

It is an arithmetic number, because the mean of its divisors is an integer number (11580547104).

Almost surely, 2^667878362580 is an apocalyptic number.

667878362580 is a gapful number since it is divisible by the number (60) 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 667878362580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1111732521984).

667878362580 is an abundant number, since it is smaller than the sum of its proper divisors (1555586681388).

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

667878362580 is a wasteful number, since it uses less digits than its factorization.

667878362580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937966 (or 937964 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 66.

The spelling of 667878362580 in words is "six hundred sixty-seven billion, eight hundred seventy-eight million, three hundred sixty-two thousand, five hundred eighty".