70661915 has 16 divisors (see below), whose sum is σ = 87091200. Its totient is φ = 55012320.

The previous prime is 70661891. The next prime is 70661939. The reversal of 70661915 is 51916607.

It is an interprime number because it is at equal distance from previous prime (70661891) and next prime (70661939).

It is not a de Polignac number, because 70661915 - 2⁸ = 70661659 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46010 + ... + 47520.

It is an arithmetic number, because the mean of its divisors is an integer number (5443200).

Almost surely, 2^70661915 is an apocalyptic number.

70661915 is a deficient number, since it is larger than the sum of its proper divisors (16429285).

70661915 is a wasteful number, since it uses less digits than its factorization.

70661915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1762.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 70661915 is about 8406.0641801024. The cubic root of 70661915 is about 413.4234761917.

The spelling of 70661915 in words is "seventy million, six hundred sixty-one thousand, nine hundred fifteen".