66064688 has 20 divisors (see below), whose sum is σ = 128938920. Its totient is φ = 32790144.

The previous prime is 66064681. The next prime is 66064709. The reversal of 66064688 is 88646066.

It is not an unprimeable number, because it can be changed into a prime (66064681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12878 + ... + 17261.

It is an arithmetic number, because the mean of its divisors is an integer number (6446946).

Almost surely, 2^66064688 is an apocalyptic number.

It is an amenable number.

66064688 is a deficient number, since it is larger than the sum of its proper divisors (62874232).

66064688 is a wasteful number, since it uses less digits than its factorization.

66064688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30284 (or 30278 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 66064688 is about 8128.0187007659. The cubic root of 66064688 is about 404.2559891194.

The spelling of 66064688 in words is "sixty-six million, sixty-four thousand, six hundred eighty-eight".