66018976 has 24 divisors (see below), whose sum is σ = 131320980. Its totient is φ = 32667648.

The previous prime is 66018949. The next prime is 66018991. The reversal of 66018976 is 67981066.

It can be written as a sum of positive squares in 2 ways, for example, as 65999376 + 19600 = 8124^2 + 140^2 .

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, 7531 + ... + 13738.

Almost surely, 2^66018976 is an apocalyptic number.

It is an amenable number.

66018976 is a deficient number, since it is larger than the sum of its proper divisors (65302004).

66018976 is a wasteful number, since it uses less digits than its factorization.

66018976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21376 (or 21368 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 66018976 is about 8125.2062127678. The cubic root of 66018976 is about 404.1627289422.

The spelling of 66018976 in words is "sixty-six million, eighteen thousand, nine hundred seventy-six".