66525994 has 8 divisors (see below), whose sum is σ = 100991520. Its totient is φ = 32862156.

The previous prime is 66525989. The next prime is 66526001. The reversal of 66525994 is 49952566.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 200214 + ... + 200545.

It is an arithmetic number, because the mean of its divisors is an integer number (12623940).

Almost surely, 2^66525994 is an apocalyptic number.

66525994 is a deficient number, since it is larger than the sum of its proper divisors (34465526).

66525994 is a wasteful number, since it uses less digits than its factorization.

66525994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400844.

The product of its digits is 583200, while the sum is 46.

The square root of 66525994 is about 8156.3468538311. The cubic root of 66525994 is about 405.1947323456.

The spelling of 66525994 in words is "sixty-six million, five hundred twenty-five thousand, nine hundred ninety-four".