77233766399 has 4 divisors (see below), whose sum is σ = 77267217720. Its totient is φ = 77200315080.

The previous prime is 77233766377. The next prime is 77233766497. The reversal of 77233766399 is 99366733277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99366733277 = 7 ⋅14195247611.

It is a cyclic number.

It is not a de Polignac number, because 77233766399 - 2¹² = 77233762303 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77233766339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16722197 + ... + 16726814.

It is an arithmetic number, because the mean of its divisors is an integer number (19316804430).

Almost surely, 2^77233766399 is an apocalyptic number.

77233766399 is a deficient number, since it is larger than the sum of its proper divisors (33451321).

77233766399 is a wasteful number, since it uses less digits than its factorization.

77233766399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33451320.

The product of its digits is 54010152, while the sum is 62.

The spelling of 77233766399 in words is "seventy-seven billion, two hundred thirty-three million, seven hundred sixty-six thousand, three hundred ninety-nine".