77764225766 has 4 divisors (see below), whose sum is σ = 116646338652. Its totient is φ = 38882112882.

The previous prime is 77764225711. The next prime is 77764225787. The reversal of 77764225766 is 66752246777.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19441056440 + ... + 19441056443.

It is an arithmetic number, because the mean of its divisors is an integer number (29161584663).

Almost surely, 2^77764225766 is an apocalyptic number.

77764225766 is a deficient number, since it is larger than the sum of its proper divisors (38882112886).

77764225766 is a wasteful number, since it uses less digits than its factorization.

77764225766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38882112885.

The product of its digits is 41489280, while the sum is 59.

The spelling of 77764225766 in words is "seventy-seven billion, seven hundred sixty-four million, two hundred twenty-five thousand, seven hundred sixty-six".