70721677507 has 16 divisors (see below), whose sum is σ = 80191471360. Its totient is φ = 61829363232.

The previous prime is 70721677487. The next prime is 70721677511. The reversal of 70721677507 is 70577612707.

It is not a de Polignac number, because 70721677507 - 2¹¹ = 70721675459 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70721677597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 952978 + ... + 1024504.

It is an arithmetic number, because the mean of its divisors is an integer number (5011966960).

Almost surely, 2^70721677507 is an apocalyptic number.

70721677507 is a deficient number, since it is larger than the sum of its proper divisors (9469793853).

70721677507 is a wasteful number, since it uses less digits than its factorization.

70721677507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75562.

The product of its (nonzero) digits is 1008420, while the sum is 49.

The spelling of 70721677507 in words is "seventy billion, seven hundred twenty-one million, six hundred seventy-seven thousand, five hundred seven".