66065996 has 12 divisors (see below), whose sum is σ = 115745448. Its totient is φ = 32995872.

The previous prime is 66065977. The next prime is 66066043. The reversal of 66065996 is 69956066.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 66065996.

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, 5066 + ... + 12561.

It is an arithmetic number, because the mean of its divisors is an integer number (9645454).

Almost surely, 2^66065996 is an apocalyptic number.

It is an amenable number.

66065996 is a deficient number, since it is larger than the sum of its proper divisors (49679452).

66065996 is a wasteful number, since it uses less digits than its factorization.

66065996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18568 (or 18566 counting only the distinct ones).

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 66065996 is about 8128.0991627809. The cubic root of 66065996 is about 404.2586570265.

The spelling of 66065996 in words is "sixty-six million, sixty-five thousand, nine hundred ninety-six".