2664756 has 18 divisors (see below), whose sum is σ = 6736002. Its totient is φ = 888240.

The previous prime is 2664721. The next prime is 2664763. The reversal of 2664756 is 6574662.

2664756 is a `hidden beast` number, since 2 + 6 + 647 + 5 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 608400 = 1434^2 + 780^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 74021 = 2664756 / (2 + 6 + 6 + 4 + 7 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 2664756.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 36975 + ... + 37046.

2^2664756 is an apocalyptic number.

It is an amenable number.

2664756 is an abundant number, since it is smaller than the sum of its proper divisors (4071246).

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

2664756 is a wasteful number, since it uses less digits than its factorization.

2664756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74031 (or 74026 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 2664756 is about 1632.4080372260. The cubic root of 2664756 is about 138.6391274001.

The spelling of 2664756 in words is "two million, six hundred sixty-four thousand, seven hundred fifty-six".