2666604313818 has 32 divisors (see below), whose sum is σ = 5925870302400. Its totient is φ = 888855663888.

The previous prime is 2666604313739. The next prime is 2666604313823. The reversal of 2666604313818 is 8183134066662.

2666604313818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2666604313818² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4064728 + ... + 4674956.

It is an arithmetic number, because the mean of its divisors is an integer number (185183446950).

Almost surely, 2^{2666604313818} is an apocalyptic number.

2666604313818 is an abundant number, since it is smaller than the sum of its proper divisors (3259265988582).

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

2666604313818 is a wasteful number, since it uses less digits than its factorization.

2666604313818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691163 (or 691157 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 54.

The spelling of 2666604313818 in words is "two trillion, six hundred sixty-six billion, six hundred four million, three hundred thirteen thousand, eight hundred eighteen".