64077667777 has 2 divisors, whose sum is σ = 64077667778. Its totient is φ = 64077667776.

The previous prime is 64077667757. The next prime is 64077667793. The reversal of 64077667777 is 77776677046.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54213999921 + 9863667856 = 232839^2 + 99316^2 .

It is a cyclic number.

It is not a de Polignac number, because 64077667777 - 2¹⁹ = 64077143489 is a prime.

It is not a weakly prime, because it can be changed into another prime (64077667757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32038833888 + 32038833889.

It is an arithmetic number, because the mean of its divisors is an integer number (32038833889).

Almost surely, 2^64077667777 is an apocalyptic number.

It is an amenable number.

64077667777 is a deficient number, since it is larger than the sum of its proper divisors (1).

64077667777 is an equidigital number, since it uses as much as digits as its factorization.

64077667777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 101648736, while the sum is 64.

The spelling of 64077667777 in words is "sixty-four billion, seventy-seven million, six hundred sixty-seven thousand, seven hundred seventy-seven".