70661555615 has 64 divisors (see below), whose sum is σ = 104523955200. Its totient is φ = 44754425856.

The previous prime is 70661555603. The next prime is 70661555633. The reversal of 70661555615 is 51655516607.

It is not a de Polignac number, because 70661555615 - 2⁶ = 70661555551 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70661555615.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 26573156 + ... + 26575814.

It is an arithmetic number, because the mean of its divisors is an integer number (1633186800).

Almost surely, 2^70661555615 is an apocalyptic number.

70661555615 is a deficient number, since it is larger than the sum of its proper divisors (33862399585).

70661555615 is a wasteful number, since it uses less digits than its factorization.

70661555615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3504.

The product of its (nonzero) digits is 945000, while the sum is 47.

The spelling of 70661555615 in words is "seventy billion, six hundred sixty-one million, five hundred fifty-five thousand, six hundred fifteen".