66604616363061 has 24 divisors (see below), whose sum is σ = 111342256014080. Its totient is φ = 37578011399136.

The previous prime is 66604616363057. The next prime is 66604616363083. The reversal of 66604616363061 is 16036361640666.

It is not a de Polignac number, because 66604616363061 - 2² = 66604616363057 is a prime.

It is a super-2 number, since 2×66604616363061² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66604616362989 and 66604616363007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66604616364061) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6691236370 + ... + 6691246323.

Almost surely, 2^{66604616363061} is an apocalyptic number.

It is an amenable number.

66604616363061 is a deficient number, since it is larger than the sum of its proper divisors (44737639651019).

66604616363061 is a wasteful number, since it uses less digits than its factorization.

66604616363061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13382482785 (or 13382482782 counting only the distinct ones).

The product of its (nonzero) digits is 10077696, while the sum is 54.

The spelling of 66604616363061 in words is "sixty-six trillion, six hundred four billion, six hundred sixteen million, three hundred sixty-three thousand, sixty-one".