5665156506 has 48 divisors (see below), whose sum is σ = 12642485544. Its totient is φ = 1832067072.

The previous prime is 5665156499. The next prime is 5665156537. The reversal of 5665156506 is 6056515665.

It can be written as a sum of positive squares in 4 ways, for example, as 5648875281 + 16281225 = 75159^2 + 4035^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 223050 + ... + 247146.

Almost surely, 2^5665156506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5665156506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6321242772).

5665156506 is an abundant number, since it is smaller than the sum of its proper divisors (6977329038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5665156506 is a wasteful number, since it uses less digits than its factorization.

5665156506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24495 (or 24492 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The square root of 5665156506 is about 75267.2339467846. The cubic root of 5665156506 is about 1782.6686924991.

The spelling of 5665156506 in words is "five billion, six hundred sixty-five million, one hundred fifty-six thousand, five hundred six".