2566631 has 8 divisors (see below), whose sum is σ = 2652480. Its totient is φ = 2482272.

The previous prime is 2566601. The next prime is 2566633. The reversal of 2566631 is 1366652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2566631 - 2⁶ = 2566567 is a prime.

It is a super-2 number, since 2×2566631² = 13175189380322, 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 = 2566594 and 2566603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3881 + ... + 4493.

It is an arithmetic number, because the mean of its divisors is an integer number (331560).

2^2566631 is an apocalyptic number.

2566631 is a deficient number, since it is larger than the sum of its proper divisors (85849).

2566631 is an equidigital number, since it uses as much as digits as its factorization.

2566631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745.

The product of its digits is 6480, while the sum is 29.

The square root of 2566631 is about 1602.0708473722. The cubic root of 2566631 is about 136.9160869266.

The spelling of 2566631 in words is "two million, five hundred sixty-six thousand, six hundred thirty-one".