66016564 has 12 divisors (see below), whose sum is σ = 121609600. Its totient is φ = 31270968.

The previous prime is 66016549. The next prime is 66016571. The reversal of 66016564 is 46561066.

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, 434244 + ... + 434395.

Almost surely, 2^66016564 is an apocalyptic number.

It is an amenable number.

66016564 is a deficient number, since it is larger than the sum of its proper divisors (55593036).

66016564 is a wasteful number, since it uses less digits than its factorization.

66016564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868662 (or 868660 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 66016564 is about 8125.0577844099. The cubic root of 66016564 is about 404.1578068605.

The spelling of 66016564 in words is "sixty-six million, sixteen thousand, five hundred sixty-four".