77692769661 has 16 divisors (see below), whose sum is σ = 116409234816. Its totient is φ = 45732198336.

The previous prime is 77692769639. The next prime is 77692769669. The reversal of 77692769661 is 16696729677.

It is not a de Polignac number, because 77692769661 - 2⁵ = 77692769629 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77692769592 and 77692769601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77692769669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43306110 + ... + 43307903.

It is an arithmetic number, because the mean of its divisors is an integer number (7275577176).

Almost surely, 2^77692769661 is an apocalyptic number.

It is an amenable number.

77692769661 is a deficient number, since it is larger than the sum of its proper divisors (38716465155).

77692769661 is a wasteful number, since it uses less digits than its factorization.

77692769661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86614052.

The product of its digits is 72013536, while the sum is 66.

The spelling of 77692769661 in words is "seventy-seven billion, six hundred ninety-two million, seven hundred sixty-nine thousand, six hundred sixty-one".