66164650 has 48 divisors (see below), whose sum is σ = 130527360. Its totient is φ = 24883200.

The previous prime is 66164641. The next prime is 66164653. The reversal of 66164650 is 5646166.

It is not an unprimeable number, because it can be changed into a prime (66164653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244015 + ... + 244285.

It is an arithmetic number, because the mean of its divisors is an integer number (2719320).

Almost surely, 2^66164650 is an apocalyptic number.

66164650 is a deficient number, since it is larger than the sum of its proper divisors (64362710).

66164650 is a wasteful number, since it uses less digits than its factorization.

66164650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 554 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 66164650 is about 8134.1655994945. The cubic root of 66164650 is about 404.4597786377.

The spelling of 66164650 in words is "sixty-six million, one hundred sixty-four thousand, six hundred fifty".