66580804 has 12 divisors (see below), whose sum is σ = 116574444. Its totient is φ = 33273824.

The previous prime is 66580793. The next prime is 66580907. The reversal of 66580804 is 40808566.

It can be written as a sum of positive squares in 2 ways, for example, as 43560000 + 23020804 = 6600^2 + 4798^2 .

It is a super-2 number, since 2×66580804² = 8866006922572832, which contains 22 as substring.

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, 11214 + ... + 16090.

It is an arithmetic number, because the mean of its divisors is an integer number (9714537).

Almost surely, 2^66580804 is an apocalyptic number.

It is an amenable number.

66580804 is a deficient number, since it is larger than the sum of its proper divisors (49993640).

66580804 is a wasteful number, since it uses less digits than its factorization.

66580804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8294 (or 8292 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 66580804 is about 8159.7061221591. The cubic root of 66580804 is about 405.3059802232.

The spelling of 66580804 in words is "sixty-six million, five hundred eighty thousand, eight hundred four".