66550976 has 28 divisors (see below), whose sum is σ = 133029960. Its totient is φ = 33031680.

The previous prime is 66550949. The next prime is 66550993. The reversal of 66550976 is 67905566.

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, 5156 + ... + 12636.

It is an arithmetic number, because the mean of its divisors is an integer number (4751070).

Almost surely, 2^66550976 is an apocalyptic number.

It is an amenable number.

66550976 is a deficient number, since it is larger than the sum of its proper divisors (66478984).

66550976 is a wasteful number, since it uses less digits than its factorization.

66550976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632 (or 7622 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 44.

The square root of 66550976 is about 8157.8781555010. The cubic root of 66550976 is about 405.2454458957.

The spelling of 66550976 in words is "sixty-six million, five hundred fifty thousand, nine hundred seventy-six".