77666796 has 48 divisors (see below), whose sum is σ = 203929600. Its totient is φ = 25558416.

The previous prime is 77666789. The next prime is 77666819. The reversal of 77666796 is 69766677.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 3981 + ... + 13083.

Almost surely, 2^77666796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77666796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101964800).

77666796 is an abundant number, since it is smaller than the sum of its proper divisors (126262804).

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

77666796 is a wasteful number, since it uses less digits than its factorization.

77666796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9195 (or 9187 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 54.

The square root of 77666796 is about 8812.8767153524. The cubic root of 77666796 is about 426.6565950856.

The spelling of 77666796 in words is "seventy-seven million, six hundred sixty-six thousand, seven hundred ninety-six".