66660270252 has 24 divisors (see below), whose sum is σ = 155605051056. Its totient is φ = 22210887168.

The previous prime is 66660270221. The next prime is 66660270311. The reversal of 66660270252 is 25207206666.

It is a happy number.

It is a super-2 number, since 2×66660270252² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1120153 + ... + 1178160.

It is an arithmetic number, because the mean of its divisors is an integer number (6483543794).

Almost surely, 2^66660270252 is an apocalyptic number.

It is an amenable number.

66660270252 is an abundant number, since it is smaller than the sum of its proper divisors (88944780804).

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

66660270252 is a wasteful number, since it uses less digits than its factorization.

66660270252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2300737 (or 2300735 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 66660270252 in words is "sixty-six billion, six hundred sixty million, two hundred seventy thousand, two hundred fifty-two".