5151565661 has 8 divisors (see below), whose sum is σ = 5621384448. Its totient is φ = 4681996000.

The previous prime is 5151565649. The next prime is 5151565667. The reversal of 5151565661 is 1665651515.

5151565661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 5151565661 - 2¹⁰ = 5151564637 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 (5151565667) 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, 17645 + ... + 103026.

It is an arithmetic number, because the mean of its divisors is an integer number (702673056).

Almost surely, 2^5151565661 is an apocalyptic number.

It is an amenable number.

5151565661 is a deficient number, since it is larger than the sum of its proper divisors (469818787).

5151565661 is a wasteful number, since it uses less digits than its factorization.

5151565661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124563.

The product of its digits is 135000, while the sum is 41.

The square root of 5151565661 is about 71774.4081201649. The cubic root of 5151565661 is about 1727.0824851157.

The spelling of 5151565661 in words is "five billion, one hundred fifty-one million, five hundred sixty-five thousand, six hundred sixty-one".