66697670364 has 24 divisors (see below), whose sum is σ = 167599274640. Its totient is φ = 20522360064.

The previous prime is 66697670363. The next prime is 66697670371. The reversal of 66697670364 is 46307679666.

It is a junction number, because it is equal to n+sod(n) for n = 66697670298 and 66697670307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66697670363) 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, 213774429 + ... + 213774740.

It is an arithmetic number, because the mean of its divisors is an integer number (6983303110).

Almost surely, 2^66697670364 is an apocalyptic number.

It is an amenable number.

66697670364 is an abundant number, since it is smaller than the sum of its proper divisors (100901604276).

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

66697670364 is a wasteful number, since it uses less digits than its factorization.

66697670364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427549189 (or 427549187 counting only the distinct ones).

The product of its (nonzero) digits is 41150592, while the sum is 60.

The spelling of 66697670364 in words is "sixty-six billion, six hundred ninety-seven million, six hundred seventy thousand, three hundred sixty-four".