77667966384 has 80 divisors (see below), whose sum is σ = 204568906752. Its totient is φ = 25383331584.

The previous prime is 77667966367. The next prime is 77667966443. The reversal of 77667966384 is 48366976677.

It is a super-4 number, since 4×77667966384⁴ (a number of 45 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

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, 3976707 + ... + 3996189.

Almost surely, 2^77667966384 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 77667966384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102284453376).

77667966384 is an abundant number, since it is smaller than the sum of its proper divisors (126900940368).

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

77667966384 is a wasteful number, since it uses less digits than its factorization.

77667966384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21114 (or 21108 counting only the distinct ones).

The product of its digits is 384072192, while the sum is 69.

The spelling of 77667966384 in words is "seventy-seven billion, six hundred sixty-seven million, nine hundred sixty-six thousand, three hundred eighty-four".