668102769432 has 128 divisors (see below), whose sum is σ = 2121263040000. Its totient is φ = 190859338368.

The previous prime is 668102769421. The next prime is 668102769461. The reversal of 668102769432 is 234967201866.

668102769432 is a `hidden beast` number, since 66 + 81 + 0 + 2 + 76 + 9 + 432 = 666.

It is a super-2 number, since 2×668102769432² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12157794 + ... + 12212622.

It is an arithmetic number, because the mean of its divisors is an integer number (16572367500).

Almost surely, 2^668102769432 is an apocalyptic number.

It is an amenable number.

668102769432 is an abundant number, since it is smaller than the sum of its proper divisors (1453160270568).

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

668102769432 is a wasteful number, since it uses less digits than its factorization.

668102769432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62910 (or 62900 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 668102769432 in words is "six hundred sixty-eight billion, one hundred two million, seven hundred sixty-nine thousand, four hundred thirty-two".