77763705476666 has 16 divisors (see below), whose sum is σ = 128011674127680. Its totient is φ = 35135479337280.

The previous prime is 77763705476659. The next prime is 77763705476747. The reversal of 77763705476666 is 66667450736777.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10582972031 + ... + 10582979378.

It is an arithmetic number, because the mean of its divisors is an integer number (8000729632980).

Almost surely, 2^{77763705476666} is an apocalyptic number.

77763705476666 is a deficient number, since it is larger than the sum of its proper divisors (50247968651014).

77763705476666 is a wasteful number, since it uses less digits than its factorization.

77763705476666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21165951589.

The product of its (nonzero) digits is 7841473920, while the sum is 77.

The spelling of 77763705476666 in words is "seventy-seven trillion, seven hundred sixty-three billion, seven hundred five million, four hundred seventy-six thousand, six hundred sixty-six".