66015080356 has 9 divisors (see below), whose sum is σ = 115527289899. Its totient is φ = 33007283244.

The previous prime is 66015080333. The next prime is 66015080371. The reversal of 66015080356 is 65308051066.

The square root of 66015080356 is 256934.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 449635 + ... + 578101.

Almost surely, 2^66015080356 is an apocalyptic number.

66015080356 is the 256934-th square number.

It is an amenable number.

66015080356 is a deficient number, since it is larger than the sum of its proper divisors (49512209543).

66015080356 is an frugal number, since it uses more digits than its factorization.

66015080356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256938 (or 128469 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 40.

The spelling of 66015080356 in words is "sixty-six billion, fifteen million, eighty thousand, three hundred fifty-six".