76866739 has 4 divisors (see below), whose sum is σ = 77453640. Its totient is φ = 76279840.

The previous prime is 76866731. The next prime is 76866749. The reversal of 76866739 is 93766867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93766867 = 9043 ⋅10369.

It is a cyclic number.

It is not a de Polignac number, because 76866739 - 2³ = 76866731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76866731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 293254 + ... + 293515.

It is an arithmetic number, because the mean of its divisors is an integer number (19363410).

Almost surely, 2^76866739 is an apocalyptic number.

76866739 is a deficient number, since it is larger than the sum of its proper divisors (586901).

76866739 is a wasteful number, since it uses less digits than its factorization.

76866739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586900.

The product of its digits is 2286144, while the sum is 52.

The square root of 76866739 is about 8767.3678490183. The cubic root of 76866739 is about 425.1865183620.

The spelling of 76866739 in words is "seventy-six million, eight hundred sixty-six thousand, seven hundred thirty-nine".