66506650 has 96 divisors (see below), whose sum is σ = 151954560. Its totient is φ = 21150720.

The previous prime is 66506641. The next prime is 66506683. The reversal of 66506650 is 5660566.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 485382 + ... + 485518.

It is an arithmetic number, because the mean of its divisors is an integer number (1582860).

Almost surely, 2^66506650 is an apocalyptic number.

66506650 is an abundant number, since it is smaller than the sum of its proper divisors (85447910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66506650 is a wasteful number, since it uses less digits than its factorization.

66506650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 66506650 is about 8155.1609426179. The cubic root of 66506650 is about 405.1554552338.

The spelling of 66506650 in words is "sixty-six million, five hundred six thousand, six hundred fifty".