77770066346455 has 16 divisors (see below), whose sum is σ = 106747172250624. Its totient is φ = 53282504864160.

The previous prime is 77770066346449. The next prime is 77770066346461. The reversal of 77770066346455 is 55464366007777.

It is an interprime number because it is at equal distance from previous prime (77770066346449) and next prime (77770066346461).

It is not a de Polignac number, because 77770066346455 - 2¹¹ = 77770066344407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 948721567 + ... + 948803536.

It is an arithmetic number, because the mean of its divisors is an integer number (6671698265664).

Almost surely, 2^{77770066346455} is an apocalyptic number.

77770066346455 is a deficient number, since it is larger than the sum of its proper divisors (28977105904169).

77770066346455 is a wasteful number, since it uses less digits than its factorization.

77770066346455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897526286.

The product of its (nonzero) digits is 622339200, while the sum is 67.

The spelling of 77770066346455 in words is "seventy-seven trillion, seven hundred seventy billion, sixty-six million, three hundred forty-six thousand, four hundred fifty-five".