77766070617775 has 24 divisors (see below), whose sum is σ = 96695473035600. Its totient is φ = 62041630560000.

The previous prime is 77766070617761. The next prime is 77766070617779. The reversal of 77766070617775 is 57771607066777.

It is a de Polignac number, because none of the positive numbers 2^k-77766070617775 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77766070617698 and 77766070617707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77766070617779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32071761 + ... + 34411189.

It is an arithmetic number, because the mean of its divisors is an integer number (4028978043150).

Almost surely, 2^{77766070617775} is an apocalyptic number.

77766070617775 is a deficient number, since it is larger than the sum of its proper divisors (18929402417825).

77766070617775 is a wasteful number, since it uses less digits than its factorization.

77766070617775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343099 (or 2343094 counting only the distinct ones).

The product of its (nonzero) digits is 889426440, while the sum is 73.

The spelling of 77766070617775 in words is "seventy-seven trillion, seven hundred sixty-six billion, seventy million, six hundred seventeen thousand, seven hundred seventy-five".