66570657160 has 96 divisors (see below), whose sum is σ = 174800358720. Its totient is φ = 22750627200.

The previous prime is 66570657137. The next prime is 66570657163. The reversal of 66570657160 is 6175607566.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (66570657163) 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, 554955 + ... + 664165.

It is an arithmetic number, because the mean of its divisors is an integer number (1820837070).

Almost surely, 2^66570657160 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66570657160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87400179360).

66570657160 is an abundant number, since it is smaller than the sum of its proper divisors (108229701560).

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

66570657160 is a wasteful number, since it uses less digits than its factorization.

66570657160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109547 (or 109536 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 49.

The spelling of 66570657160 in words is "sixty-six billion, five hundred seventy million, six hundred fifty-seven thousand, one hundred sixty".