66325506 has 32 divisors (see below), whose sum is σ = 143606400. Its totient is φ = 20300544.

The previous prime is 66325487. The next prime is 66325513. The reversal of 66325506 is 60552366.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13386 + ... + 17658.

It is an arithmetic number, because the mean of its divisors is an integer number (4487700).

Almost surely, 2^66325506 is an apocalyptic number.

66325506 is an abundant number, since it is smaller than the sum of its proper divisors (77280894).

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

66325506 is a wasteful number, since it uses less digits than its factorization.

66325506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 66325506 is about 8144.0472739296. The cubic root of 66325506 is about 404.7872804580.

The spelling of 66325506 in words is "sixty-six million, three hundred twenty-five thousand, five hundred six".