66328506 has 24 divisors (see below), whose sum is σ = 151276320. Its totient is φ = 20945736.

The previous prime is 66328453. The next prime is 66328511. The reversal of 66328506 is 60582366.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96630 + ... + 97313.

It is an arithmetic number, because the mean of its divisors is an integer number (6303180).

Almost surely, 2^66328506 is an apocalyptic number.

66328506 is an abundant number, since it is smaller than the sum of its proper divisors (84947814).

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

66328506 is a wasteful number, since it uses less digits than its factorization.

66328506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193970 (or 193967 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 66328506 is about 8144.2314554536. The cubic root of 66328506 is about 404.7933834069.

The spelling of 66328506 in words is "sixty-six million, three hundred twenty-eight thousand, five hundred six".