66795940 has 12 divisors (see below), whose sum is σ = 140271516. Its totient is φ = 26718368.

The previous prime is 66795931. The next prime is 66795973. The reversal of 66795940 is 4959766.

It can be written as a sum of positive squares in 2 ways, for example, as 38663524 + 28132416 = 6218^2 + 5304^2 .

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, 1669879 + ... + 1669918.

It is an arithmetic number, because the mean of its divisors is an integer number (11689293).

Almost surely, 2^66795940 is an apocalyptic number.

It is an amenable number.

66795940 is an abundant number, since it is smaller than the sum of its proper divisors (73475576).

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

66795940 is a wasteful number, since it uses less digits than its factorization.

66795940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3339806 (or 3339804 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 66795940 is about 8172.8783179489. The cubic root of 66795940 is about 405.7420526570.

The spelling of 66795940 in words is "sixty-six million, seven hundred ninety-five thousand, nine hundred forty".