77006669 has 2 divisors, whose sum is σ = 77006670. Its totient is φ = 77006668.

The previous prime is 77006641. The next prime is 77006681. The reversal of 77006669 is 96660077.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41126569 + 35880100 = 6413^2 + 5990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77006669 is a prime.

It is a super-2 number, since 2×77006669² = 11860054140951122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77006869) 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, 38503334 + 38503335.

It is an arithmetic number, because the mean of its divisors is an integer number (38503335).

Almost surely, 2^77006669 is an apocalyptic number.

It is an amenable number.

77006669 is a deficient number, since it is larger than the sum of its proper divisors (1).

77006669 is an equidigital number, since it uses as much as digits as its factorization.

77006669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 41.

The square root of 77006669 is about 8775.3443807067. The cubic root of 77006669 is about 425.4443684365. Note that the first 3 decimals are identical.

The spelling of 77006669 in words is "seventy-seven million, six thousand, six hundred sixty-nine".