5166391765 has 16 divisors (see below), whose sum is σ = 6279163776. Its totient is φ = 4080456000.

The previous prime is 5166391757. The next prime is 5166391771. The reversal of 5166391765 is 5671936615.

It is not a de Polignac number, because 5166391765 - 2³ = 5166391757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102075 + ... + 144055.

It is an arithmetic number, because the mean of its divisors is an integer number (392447736).

Almost surely, 2^5166391765 is an apocalyptic number.

It is an amenable number.

5166391765 is a deficient number, since it is larger than the sum of its proper divisors (1112772011).

5166391765 is a wasteful number, since it uses less digits than its factorization.

5166391765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42300.

The product of its digits is 1020600, while the sum is 49.

The square root of 5166391765 is about 71877.6165784592. The cubic root of 5166391765 is about 1728.7377346066.

The spelling of 5166391765 in words is "five billion, one hundred sixty-six million, three hundred ninety-one thousand, seven hundred sixty-five".