77783653660 has 48 divisors (see below), whose sum is σ = 164276969472. Its totient is φ = 30936225600.

The previous prime is 77783653553. The next prime is 77783653721. The reversal of 77783653660 is 6635638777.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 77783653595 and 77783653604.

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, 12767215 + ... + 12773305.

It is an arithmetic number, because the mean of its divisors is an integer number (3422436864).

Almost surely, 2^77783653660 is an apocalyptic number.

It is an amenable number.

77783653660 is an abundant number, since it is smaller than the sum of its proper divisors (86493315812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77783653660 is a wasteful number, since it uses less digits than its factorization.

77783653660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9634 (or 9632 counting only the distinct ones).

The product of its (nonzero) digits is 26671680, while the sum is 58.

The spelling of 77783653660 in words is "seventy-seven billion, seven hundred eighty-three million, six hundred fifty-three thousand, six hundred sixty".