70571657 has 16 divisors (see below), whose sum is σ = 77720832. Its totient is φ = 63685440.

The previous prime is 70571653. The next prime is 70571689. The reversal of 70571657 is 75617507.

It is not a de Polignac number, because 70571657 - 2² = 70571653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70571657.

It is not an unprimeable number, because it can be changed into a prime (70571653) 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, 144668 + ... + 145154.

It is an arithmetic number, because the mean of its divisors is an integer number (4857552).

Almost surely, 2^70571657 is an apocalyptic number.

It is an amenable number.

70571657 is a deficient number, since it is larger than the sum of its proper divisors (7149175).

70571657 is a wasteful number, since it uses less digits than its factorization.

70571657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728.

The product of its (nonzero) digits is 51450, while the sum is 38.

The square root of 70571657 is about 8400.6938403920. The cubic root of 70571657 is about 413.2473762607.

The spelling of 70571657 in words is "seventy million, five hundred seventy-one thousand, six hundred fifty-seven".