2666755664 has 10 divisors (see below), whose sum is σ = 5166839130. Its totient is φ = 1333377824.

The previous prime is 2666755601. The next prime is 2666755673. The reversal of 2666755664 is 4665576662.

It can be written as a sum of positive squares in only one way, i.e., 1687566400 + 979189264 = 41080^2 + 31292^2 .

It is a super-2 number, since 2×2666755664² = 14223171542952161792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83336099 + ... + 83336130.

It is an arithmetic number, because the mean of its divisors is an integer number (516683913).

Almost surely, 2^2666755664 is an apocalyptic number.

It is an amenable number.

2666755664 is a deficient number, since it is larger than the sum of its proper divisors (2500083466).

2666755664 is a wasteful number, since it uses less digits than its factorization.

2666755664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166672237 (or 166672231 counting only the distinct ones).

The product of its digits is 10886400, while the sum is 53.

The square root of 2666755664 is about 51640.6396552173. The cubic root of 2666755664 is about 1386.7379753558.

The spelling of 2666755664 in words is "two billion, six hundred sixty-six million, seven hundred fifty-five thousand, six hundred sixty-four".