66897160912 has 20 divisors (see below), whose sum is σ = 133116311236. Its totient is φ = 32544564480.

The previous prime is 66897160907. The next prime is 66897160927. The reversal of 66897160912 is 21906179866.

66897160912 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35154750016 + 31742410896 = 187496^2 + 178164^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56500389 + ... + 56501572.

Almost surely, 2^66897160912 is an apocalyptic number.

It is an amenable number.

66897160912 is a deficient number, since it is larger than the sum of its proper divisors (66219150324).

66897160912 is a wasteful number, since it uses less digits than its factorization.

66897160912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113002006 (or 113002000 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 66897160912 in words is "sixty-six billion, eight hundred ninety-seven million, one hundred sixty thousand, nine hundred twelve".