66384956 has 48 divisors (see below), whose sum is σ = 131625312. Its totient is φ = 29272320.

The previous prime is 66384953. The next prime is 66384961. The reversal of 66384956 is 65948366.

It is a self number, because there is not a number n which added to its sum of digits gives 66384956.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66384953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196820 + ... + 197156.

It is an arithmetic number, because the mean of its divisors is an integer number (2742194).

Almost surely, 2^66384956 is an apocalyptic number.

It is an amenable number.

66384956 is a deficient number, since it is larger than the sum of its proper divisors (65240356).

66384956 is a wasteful number, since it uses less digits than its factorization.

66384956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 387 counting only the distinct ones).

The product of its digits is 933120, while the sum is 47.

The square root of 66384956 is about 8147.6963615491. The cubic root of 66384956 is about 404.9081862696.

The spelling of 66384956 in words is "sixty-six million, three hundred eighty-four thousand, nine hundred fifty-six".