666704040032 has 24 divisors (see below), whose sum is σ = 1312679031552. Its totient is φ = 333325238400.

The previous prime is 666704040017. The next prime is 666704040043. The reversal of 666704040032 is 230040407666.

It is a super-2 number, since 2×666704040032² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 429344 + ... + 1231967.

It is an arithmetic number, because the mean of its divisors is an integer number (54694959648).

Almost surely, 2^666704040032 is an apocalyptic number.

It is an amenable number.

666704040032 is a deficient number, since it is larger than the sum of its proper divisors (645974991520).

666704040032 is a wasteful number, since it uses less digits than its factorization.

666704040032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673862 (or 1673854 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 38.

Adding to 666704040032 its reverse (230040407666), we get a palindrome (896744447698).

The spelling of 666704040032 in words is "six hundred sixty-six billion, seven hundred four million, forty thousand, thirty-two".