77668153 has 2 divisors, whose sum is σ = 77668154. Its totient is φ = 77668152.

The previous prime is 77668127. The next prime is 77668159. The reversal of 77668153 is 35186677.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 13155129 = 8032^2 + 3627^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77668153 is a prime.

It is not a weakly prime, because it can be changed into another prime (77668159) 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 as a sum of consecutive naturals, namely, 38834076 + 38834077.

It is an arithmetic number, because the mean of its divisors is an integer number (38834077).

Almost surely, 2^77668153 is an apocalyptic number.

It is an amenable number.

77668153 is a deficient number, since it is larger than the sum of its proper divisors (1).

77668153 is an equidigital number, since it uses as much as digits as its factorization.

77668153 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 211680, while the sum is 43.

The square root of 77668153 is about 8812.9537046327. The cubic root of 77668153 is about 426.6590799297.

The spelling of 77668153 in words is "seventy-seven million, six hundred sixty-eight thousand, one hundred fifty-three".