6623261605 has 4 divisors (see below), whose sum is σ = 7947913932. Its totient is φ = 5298609280.

The previous prime is 6623261581. The next prime is 6623261609. The reversal of 6623261605 is 5061623266.

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

It can be written as a sum of positive squares in 2 ways, for example, as 887622849 + 5735638756 = 29793^2 + 75734^2 .

It is not a de Polignac number, because 6623261605 - 2²¹ = 6621164453 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 (6623261609) 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, 662326156 + ... + 662326165.

It is an arithmetic number, because the mean of its divisors is an integer number (1986978483).

Almost surely, 2^6623261605 is an apocalyptic number.

It is an amenable number.

6623261605 is a deficient number, since it is larger than the sum of its proper divisors (1324652327).

6623261605 is a wasteful number, since it uses less digits than its factorization.

6623261605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1324652326.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6623261605 is about 81383.4234042781. The cubic root of 6623261605 is about 1877.9785883155.

The spelling of 6623261605 in words is "six billion, six hundred twenty-three million, two hundred sixty-one thousand, six hundred five".