66606666833104 has 20 divisors (see below), whose sum is σ = 130683966573760. Its totient is φ = 32881772233440.

The previous prime is 66606666833059. The next prime is 66606666833219. The reversal of 66606666833104 is 40133866660666.

It is a super-2 number, since 2×66606666833104² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

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, 26347572642 + ... + 26347575169.

It is an arithmetic number, because the mean of its divisors is an integer number (6534198328688).

Almost surely, 2^{66606666833104} is an apocalyptic number.

It is an amenable number.

66606666833104 is a deficient number, since it is larger than the sum of its proper divisors (64077299740656).

66606666833104 is a wasteful number, since it uses less digits than its factorization.

66606666833104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52695147898 (or 52695147892 counting only the distinct ones).

The product of its (nonzero) digits is 80621568, while the sum is 61.

The spelling of 66606666833104 in words is "sixty-six trillion, six hundred six billion, six hundred sixty-six million, eight hundred thirty-three thousand, one hundred four".