2653404661 has 4 divisors (see below), whose sum is σ = 2667297024. Its totient is φ = 2639512300.

The previous prime is 2653404653. The next prime is 2653404707. The reversal of 2653404661 is 1664043562.

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 a cyclic number.

It is not a de Polignac number, because 2653404661 - 2³ = 2653404653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2653404661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2653404161) 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, 6945895 + ... + 6946276.

It is an arithmetic number, because the mean of its divisors is an integer number (666824256).

Almost surely, 2^2653404661 is an apocalyptic number.

It is an amenable number.

2653404661 is a deficient number, since it is larger than the sum of its proper divisors (13892363).

2653404661 is a wasteful number, since it uses less digits than its factorization.

2653404661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13892362.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 2653404661 is about 51511.2090811311. The cubic root of 2653404661 is about 1384.4198869455.

The spelling of 2653404661 in words is "two billion, six hundred fifty-three million, four hundred four thousand, six hundred sixty-one".