2613626661 has 4 divisors (see below), whose sum is σ = 3484835552. Its totient is φ = 1742417772.

The previous prime is 2613626657. The next prime is 2613626707. The reversal of 2613626661 is 1666263162.

2613626661 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2613626661 - 2² = 2613626657 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 (2613626611) 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, 435604441 + ... + 435604446.

It is an arithmetic number, because the mean of its divisors is an integer number (871208888).

Almost surely, 2^2613626661 is an apocalyptic number.

It is an amenable number.

2613626661 is a deficient number, since it is larger than the sum of its proper divisors (871208891).

2613626661 is an equidigital number, since it uses as much as digits as its factorization.

2613626661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 871208890.

The product of its digits is 93312, while the sum is 39.

The square root of 2613626661 is about 51123.6409208108. The cubic root of 2613626661 is about 1377.4669385556.

The spelling of 2613626661 in words is "two billion, six hundred thirteen million, six hundred twenty-six thousand, six hundred sixty-one".