5651556665 has 8 divisors (see below), whose sum is σ = 7076731968. Its totient is φ = 4324669360.

The previous prime is 5651556641. The next prime is 5651556667. The reversal of 5651556665 is 5666551565.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5651556665 - 2⁸ = 5651556409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5651556667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24571871 + ... + 24572100.

It is an arithmetic number, because the mean of its divisors is an integer number (884591496).

Almost surely, 2^5651556665 is an apocalyptic number.

It is an amenable number.

5651556665 is a deficient number, since it is larger than the sum of its proper divisors (1425175303).

5651556665 is a wasteful number, since it uses less digits than its factorization.

5651556665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49143999.

The product of its digits is 4050000, while the sum is 50.

The square root of 5651556665 is about 75176.8359602877. The cubic root of 5651556665 is about 1781.2410510436.

The spelling of 5651556665 in words is "five billion, six hundred fifty-one million, five hundred fifty-six thousand, six hundred sixty-five".