66796590 has 64 divisors (see below), whose sum is σ = 192867840. Its totient is φ = 14463360.

The previous prime is 66796573. The next prime is 66796603. The reversal of 66796590 is 9569766.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4381 + ... + 12360.

It is an arithmetic number, because the mean of its divisors is an integer number (3013560).

Almost surely, 2^66796590 is an apocalyptic number.

66796590 is an abundant number, since it is smaller than the sum of its proper divisors (126071250).

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

66796590 is a wasteful number, since it uses less digits than its factorization.

66796590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16777.

The product of its (nonzero) digits is 612360, while the sum is 48.

The square root of 66796590 is about 8172.9180835244. The cubic root of 66796590 is about 405.7433687623.

The spelling of 66796590 in words is "sixty-six million, seven hundred ninety-six thousand, five hundred ninety".