66456516 has 48 divisors (see below), whose sum is σ = 183335040. Its totient is φ = 18332160.

The previous prime is 66456491. The next prime is 66456521. The reversal of 66456516 is 61565466.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11205 + ... + 16076.

It is an arithmetic number, because the mean of its divisors is an integer number (3819480).

Almost surely, 2^66456516 is an apocalyptic number.

It is an amenable number.

66456516 is an abundant number, since it is smaller than the sum of its proper divisors (116878524).

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

66456516 is a wasteful number, since it uses less digits than its factorization.

66456516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27324 (or 27322 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 66456516 is about 8152.0866040542. The cubic root of 66456516 is about 405.0536249676.

The spelling of 66456516 in words is "sixty-six million, four hundred fifty-six thousand, five hundred sixteen".