66107215472 has 40 divisors (see below), whose sum is σ = 131114767344. Its totient is φ = 32271773184.

The previous prime is 66107215417. The next prime is 66107215477. The reversal of 66107215472 is 27451270166.

It is a super-2 number, since 2×66107215472² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66107215477) 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, 1793258 + ... + 1829750.

Almost surely, 2^66107215472 is an apocalyptic number.

It is an amenable number.

66107215472 is a deficient number, since it is larger than the sum of its proper divisors (65007551872).

66107215472 is a wasteful number, since it uses less digits than its factorization.

66107215472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39177 (or 39171 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The spelling of 66107215472 in words is "sixty-six billion, one hundred seven million, two hundred fifteen thousand, four hundred seventy-two".