66660652 has 6 divisors (see below), whose sum is σ = 116656148. Its totient is φ = 33330324.

The previous prime is 66660637. The next prime is 66660701. The reversal of 66660652 is 25606666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8332578 + ... + 8332585.

Almost surely, 2^66660652 is an apocalyptic number.

It is an amenable number.

66660652 is a deficient number, since it is larger than the sum of its proper divisors (49995496).

66660652 is a wasteful number, since it uses less digits than its factorization.

66660652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16665167 (or 16665165 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 66660652 is about 8164.5974793617. The cubic root of 66660652 is about 405.4679385323.

The spelling of 66660652 in words is "sixty-six million, six hundred sixty thousand, six hundred fifty-two".