2660351722631 has 4 divisors (see below), whose sum is σ = 2660695400664. Its totient is φ = 2660008044600.

The previous prime is 2660351722543. The next prime is 2660351722673. The reversal of 2660351722631 is 1362271530662.

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

It is a cyclic number.

It is not a de Polignac number, because 2660351722631 - 2¹⁰ = 2660351721607 is a prime.

It is a super-2 number, since 2×2660351722631² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660351722031) 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, 171827405 + ... + 171842886.

It is an arithmetic number, because the mean of its divisors is an integer number (665173850166).

Almost surely, 2^{2660351722631} is an apocalyptic number.

2660351722631 is a deficient number, since it is larger than the sum of its proper divisors (343678033).

2660351722631 is an equidigital number, since it uses as much as digits as its factorization.

2660351722631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343678032.

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 2660351722631 in words is "two trillion, six hundred sixty billion, three hundred fifty-one million, seven hundred twenty-two thousand, six hundred thirty-one".