77766433 has 2 divisors, whose sum is σ = 77766434. Its totient is φ = 77766432.

The previous prime is 77766413. The next prime is 77766467. The reversal of 77766433 is 33466777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56670784 + 21095649 = 7528^2 + 4593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77766433 is a prime.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 77766433.

It is not a weakly prime, because it can be changed into another prime (77766413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38883216 + 38883217.

It is an arithmetic number, because the mean of its divisors is an integer number (38883217).

Almost surely, 2^77766433 is an apocalyptic number.

It is an amenable number.

77766433 is a deficient number, since it is larger than the sum of its proper divisors (1).

77766433 is an equidigital number, since it uses as much as digits as its factorization.

77766433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 43.

The square root of 77766433 is about 8818.5278249830. The cubic root of 77766433 is about 426.8389665304.

The spelling of 77766433 in words is "seventy-seven million, seven hundred sixty-six thousand, four hundred thirty-three".