75640807 has 8 divisors (see below), whose sum is σ = 82729872. Its totient is φ = 68587200.

The previous prime is 75640781. The next prime is 75640811. The reversal of 75640807 is 70804657.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-75640807 is a prime.

It is a super-2 number, since 2×75640807² = 11443063367222498, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75640897) 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, 4294 + ... + 13027.

It is an arithmetic number, because the mean of its divisors is an integer number (10341234).

Almost surely, 2^75640807 is an apocalyptic number.

75640807 is a deficient number, since it is larger than the sum of its proper divisors (7089065).

75640807 is a wasteful number, since it uses less digits than its factorization.

75640807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17729.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 75640807 is about 8697.1723565766. The cubic root of 75640807 is about 422.9139893716.

The spelling of 75640807 in words is "seventy-five million, six hundred forty thousand, eight hundred seven".