2664256068 has 18 divisors (see below), whose sum is σ = 6734647374. Its totient is φ = 888085344.

The previous prime is 2664256051. The next prime is 2664256079. The reversal of 2664256068 is 8606524662.

2664256068 is a `hidden beast` number, since 26 + 6 + 4 + 2 + 560 + 68 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1473177924 + 1191078144 = 38382^2 + 34512^2 .

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

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, 37003521 + ... + 37003592.

Almost surely, 2^2664256068 is an apocalyptic number.

It is an amenable number.

2664256068 is an abundant number, since it is smaller than the sum of its proper divisors (4070391306).

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

2664256068 is a wasteful number, since it uses less digits than its factorization.

2664256068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74007123 (or 74007118 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The square root of 2664256068 is about 51616.4321510118. The cubic root of 2664256068 is about 1386.3045687874.

The spelling of 2664256068 in words is "two billion, six hundred sixty-four million, two hundred fifty-six thousand, sixty-eight".