70506506691 has 48 divisors (see below), whose sum is σ = 105425742240. Its totient is φ = 45384468480.

The previous prime is 70506506663. The next prime is 70506506701. The reversal of 70506506691 is 19660560507.

70506506691 is a `hidden beast` number, since 7 + 0 + 50 + 6 + 506 + 6 + 91 = 666.

It is not a de Polignac number, because 70506506691 - 2⁹ = 70506506179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70506506641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8370480 + ... + 8378898.

It is an arithmetic number, because the mean of its divisors is an integer number (2196369630).

Almost surely, 2^70506506691 is an apocalyptic number.

70506506691 is a deficient number, since it is larger than the sum of its proper divisors (34919235549).

70506506691 is a wasteful number, since it uses less digits than its factorization.

70506506691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8756 (or 8753 counting only the distinct ones).

The product of its (nonzero) digits is 340200, while the sum is 45.

The spelling of 70506506691 in words is "seventy billion, five hundred six million, five hundred six thousand, six hundred ninety-one".