2016686631 has 4 divisors (see below), whose sum is σ = 2688915512. Its totient is φ = 1344457752.

The previous prime is 2016686599. The next prime is 2016686663. The reversal of 2016686631 is 1366866102.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2016686599) and next prime (2016686663).

It is not a de Polignac number, because 2016686631 - 2⁵ = 2016686599 is a prime.

It is a super-2 number, since 2×2016686631² = 8134049935308260322, which contains 22 as substring.

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 2016686631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016686671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 336114436 + ... + 336114441.

It is an arithmetic number, because the mean of its divisors is an integer number (672228878).

Almost surely, 2^2016686631 is an apocalyptic number.

2016686631 is a deficient number, since it is larger than the sum of its proper divisors (672228881).

2016686631 is an equidigital number, since it uses as much as digits as its factorization.

2016686631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672228880.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 2016686631 is about 44907.5342342463. The cubic root of 2016686631 is about 1263.4153228388.

The spelling of 2016686631 in words is "two billion, sixteen million, six hundred eighty-six thousand, six hundred thirty-one".