66604087156 has 24 divisors (see below), whose sum is σ = 116861064320. Its totient is φ = 33215313600.

The previous prime is 66604087127. The next prime is 66604087159. The reversal of 66604087156 is 65178040666.

It is a super-2 number, since 2×66604087156² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66604087159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2799760 + ... + 2823448.

Almost surely, 2^66604087156 is an apocalyptic number.

It is an amenable number.

66604087156 is a deficient number, since it is larger than the sum of its proper divisors (50256977164).

66604087156 is a wasteful number, since it uses less digits than its factorization.

66604087156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25495 (or 25493 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 66604087156 in words is "sixty-six billion, six hundred four million, eighty-seven thousand, one hundred fifty-six".