2657668634 has 16 divisors (see below), whose sum is σ = 4235430600. Its totient is φ = 1248335424.

The previous prime is 2657668631. The next prime is 2657668697. The reversal of 2657668634 is 4368667562.

2657668634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2631177025 + 26491609 = 51295^2 + 5147^2 .

It is not an unprimeable number, because it can be changed into a prime (2657668631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 617069 + ... + 621360.

Almost surely, 2^2657668634 is an apocalyptic number.

2657668634 is a deficient number, since it is larger than the sum of its proper divisors (1577761966).

2657668634 is a wasteful number, since it uses less digits than its factorization.

2657668634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238497.

The product of its digits is 8709120, while the sum is 53.

The square root of 2657668634 is about 51552.5812544823. The cubic root of 2657668634 is about 1385.1610692526.

The spelling of 2657668634 in words is "two billion, six hundred fifty-seven million, six hundred sixty-eight thousand, six hundred thirty-four".