1656679885 has 32 divisors (see below), whose sum is σ = 2313630720. Its totient is φ = 1115347968.

The previous prime is 1656679879. The next prime is 1656679951. The reversal of 1656679885 is 5889766561.

It is not a de Polignac number, because 1656679885 - 2⁵ = 1656679853 is a prime.

It is a super-2 number, since 2×1656679885² = 5489176482727226450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 609289 + ... + 612001.

It is an arithmetic number, because the mean of its divisors is an integer number (72300960).

Almost surely, 2^1656679885 is an apocalyptic number.

It is an amenable number.

1656679885 is a deficient number, since it is larger than the sum of its proper divisors (656950835).

1656679885 is a wasteful number, since it uses less digits than its factorization.

1656679885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037.

The product of its digits is 21772800, while the sum is 61.

The square root of 1656679885 is about 40702.3326727105. The cubic root of 1656679885 is about 1183.2582279031.

The spelling of 1656679885 in words is "one billion, six hundred fifty-six million, six hundred seventy-nine thousand, eight hundred eighty-five".