77009990077 has 2 divisors, whose sum is σ = 77009990078. Its totient is φ = 77009990076.

The previous prime is 77009990053. The next prime is 77009990153.

77009990077 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62654595481 + 14355394596 = 250309^2 + 119814^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 77009990077 - 2⁷ = 77009989949 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77009990027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38504995038 + 38504995039.

It is an arithmetic number, because the mean of its divisors is an integer number (38504995039).

Almost surely, 2^77009990077 is an apocalyptic number.

It is an amenable number.

77009990077 is a deficient number, since it is larger than the sum of its proper divisors (1).

77009990077 is an equidigital number, since it uses as much as digits as its factorization.

77009990077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1750329, while the sum is 55.

The spelling of 77009990077 in words is "seventy-seven billion, nine million, nine hundred ninety thousand, seventy-seven".