66646794 has 16 divisors (see below), whose sum is σ = 140309280. Its totient is φ = 21046320.

The previous prime is 66646787. The next prime is 66646819. The reversal of 66646794 is 49764666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 292197 + ... + 292424.

It is an arithmetic number, because the mean of its divisors is an integer number (8769330).

Almost surely, 2^66646794 is an apocalyptic number.

66646794 is an abundant number, since it is smaller than the sum of its proper divisors (73662486).

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

66646794 is a wasteful number, since it uses less digits than its factorization.

66646794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584645.

The product of its digits is 1306368, while the sum is 48.

The square root of 66646794 is about 8163.7487712447. The cubic root of 66646794 is about 405.4398391766.

The spelling of 66646794 in words is "sixty-six million, six hundred forty-six thousand, seven hundred ninety-four".