77466869 has 2 divisors, whose sum is σ = 77466870. Its totient is φ = 77466868.

The previous prime is 77466853. The next prime is 77466877. The reversal of 77466869 is 96866477.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39212644 + 38254225 = 6262^2 + 6185^2 .

It is a cyclic number.

It is not a de Polignac number, because 77466869 - 2⁴ = 77466853 is a prime.

It is a super-2 number, since 2×77466869² = 12002231585326322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 77466869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77466839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38733434 + 38733435.

It is an arithmetic number, because the mean of its divisors is an integer number (38733435).

Almost surely, 2^77466869 is an apocalyptic number.

It is an amenable number.

77466869 is a deficient number, since it is larger than the sum of its proper divisors (1).

77466869 is an equidigital number, since it uses as much as digits as its factorization.

77466869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 77466869 is about 8801.5265153268. The cubic root of 77466869 is about 426.2901859528.

The spelling of 77466869 in words is "seventy-seven million, four hundred sixty-six thousand, eight hundred sixty-nine".