79566553 has 16 divisors (see below), whose sum is σ = 89989632. Its totient is φ = 69696000.

The previous prime is 79566541. The next prime is 79566563. The reversal of 79566553 is 35566597.

It is not a de Polignac number, because 79566553 - 2⁵ = 79566521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79566503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120043 + ... + 120703.

It is an arithmetic number, because the mean of its divisors is an integer number (5624352).

Almost surely, 2^79566553 is an apocalyptic number.

It is an amenable number.

79566553 is a deficient number, since it is larger than the sum of its proper divisors (10423079).

79566553 is a wasteful number, since it uses less digits than its factorization.

79566553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056.

The product of its digits is 850500, while the sum is 46.

The square root of 79566553 is about 8920.0085762291. The cubic root of 79566553 is about 430.1073339413.

The spelling of 79566553 in words is "seventy-nine million, five hundred sixty-six thousand, five hundred fifty-three".