2664021631 has 16 divisors (see below), whose sum is σ = 2753510400. Its totient is φ = 2576207808.

The previous prime is 2664021599. The next prime is 2664021643. The reversal of 2664021631 is 1361204662.

It is a cyclic number.

It is not a de Polignac number, because 2664021631 - 2⁵ = 2664021599 is a prime.

It is a super-2 number, since 2×2664021631² = 14194022500871800322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2664021593 and 2664021602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2664021931) 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, 2613840 + ... + 2614858.

It is an arithmetic number, because the mean of its divisors is an integer number (172094400).

Almost surely, 2^2664021631 is an apocalyptic number.

2664021631 is a deficient number, since it is larger than the sum of its proper divisors (89488769).

2664021631 is a wasteful number, since it uses less digits than its factorization.

2664021631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1758.

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 2664021631 is about 51614.1611478865. The cubic root of 2664021631 is about 1386.2639057018.

The spelling of 2664021631 in words is "two billion, six hundred sixty-four million, twenty-one thousand, six hundred thirty-one".