79866877 has 2 divisors, whose sum is σ = 79866878. Its totient is φ = 79866876.

The previous prime is 79866851. The next prime is 79866883. The reversal of 79866877 is 77866897.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76842756 + 3024121 = 8766^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 79866877 - 2⁷ = 79866749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79866817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39933438 + 39933439.

It is an arithmetic number, because the mean of its divisors is an integer number (39933439).

Almost surely, 2^79866877 is an apocalyptic number.

It is an amenable number.

79866877 is a deficient number, since it is larger than the sum of its proper divisors (1).

79866877 is an equidigital number, since it uses as much as digits as its factorization.

79866877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7112448, while the sum is 58.

The square root of 79866877 is about 8936.8270096271. The cubic root of 79866877 is about 430.6478013054.

The spelling of 79866877 in words is "seventy-nine million, eight hundred sixty-six thousand, eight hundred seventy-seven".