640760607 has 12 divisors (see below), whose sum is σ = 955399744. Its totient is φ = 413393760.

The previous prime is 640760569. The next prime is 640760623. The reversal of 640760607 is 706067046.

640760607 is a `hidden beast` number, since 6 + 40 + 7 + 6 + 0 + 607 = 666.

It is not a de Polignac number, because 640760607 - 2⁶ = 640760543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640760677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1148038 + ... + 1148595.

Almost surely, 2^640760607 is an apocalyptic number.

640760607 is a deficient number, since it is larger than the sum of its proper divisors (314639137).

640760607 is a wasteful number, since it uses less digits than its factorization.

640760607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296670 (or 2296667 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 640760607 is about 25313.2496333442. The cubic root of 640760607 is about 862.1151321321.

The spelling of 640760607 in words is "six hundred forty million, seven hundred sixty thousand, six hundred seven".