5156165661 has 8 divisors (see below), whose sum is σ = 6876261984. Its totient is φ = 3436756560.

The previous prime is 5156165657. The next prime is 5156165669. The reversal of 5156165661 is 1665616515.

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

It is not a de Polignac number, because 5156165661 - 2² = 5156165657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5156165669) 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, 154035 + ... + 184496.

It is an arithmetic number, because the mean of its divisors is an integer number (859532748).

Almost surely, 2^5156165661 is an apocalyptic number.

It is an amenable number.

5156165661 is a deficient number, since it is larger than the sum of its proper divisors (1720096323).

5156165661 is a wasteful number, since it uses less digits than its factorization.

5156165661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343611.

The product of its digits is 162000, while the sum is 42.

The square root of 5156165661 is about 71806.4458179069. The cubic root of 5156165661 is about 1727.5963881676.

The spelling of 5156165661 in words is "five billion, one hundred fifty-six million, one hundred sixty-five thousand, six hundred sixty-one".