2660621623 has 24 divisors (see below), whose sum is σ = 3196596096. Its totient is φ = 2191741200.

The previous prime is 2660621611. The next prime is 2660621647. The reversal of 2660621623 is 3261260662.

It is not a de Polignac number, because 2660621623 - 2²¹ = 2658524471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2660621653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76768 + ... + 105898.

It is an arithmetic number, because the mean of its divisors is an integer number (133191504).

Almost surely, 2^2660621623 is an apocalyptic number.

2660621623 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2660621623 is a deficient number, since it is larger than the sum of its proper divisors (535974473).

2660621623 is a wasteful number, since it uses less digits than its factorization.

2660621623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29203 (or 29184 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 2660621623 is about 51581.2138573725. The cubic root of 2660621623 is about 1385.6739061203.

The spelling of 2660621623 in words is "two billion, six hundred sixty million, six hundred twenty-one thousand, six hundred twenty-three".