75640707 has 12 divisors (see below), whose sum is σ = 109665504. Its totient is φ = 50239440.

The previous prime is 75640703. The next prime is 75640751. The reversal of 75640707 is 70704657.

75640707 is a `hidden beast` number, since 7 + 5 + 640 + 7 + 0 + 7 = 666.

It is not a de Polignac number, because 75640707 - 2² = 75640703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75640703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13068 + ... + 17945.

It is an arithmetic number, because the mean of its divisors is an integer number (9138792).

Almost surely, 2^75640707 is an apocalyptic number.

75640707 is a deficient number, since it is larger than the sum of its proper divisors (34024797).

75640707 is a wasteful number, since it uses less digits than its factorization.

75640707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31290 (or 31287 counting only the distinct ones).

The product of its (nonzero) digits is 41160, while the sum is 36.

The square root of 75640707 is about 8697.1666075797. The cubic root of 75640707 is about 422.9138030021.

The spelling of 75640707 in words is "seventy-five million, six hundred forty thousand, seven hundred seven".