77764032406668 has 48 divisors (see below), whose sum is σ = 184651956205920. Its totient is φ = 25464887923200.

The previous prime is 77764032406661. The next prime is 77764032406733. The reversal of 77764032406668 is 86660423046777.

It is a super-4 number, since 4×77764032406668⁴ (a number of 57 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 77764032406599 and 77764032406608.

It is not an unprimeable number, because it can be changed into a prime (77764032406661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65066043 + ... + 66250418.

It is an arithmetic number, because the mean of its divisors is an integer number (3846915754290).

Almost surely, 2^{77764032406668} is an apocalyptic number.

It is an amenable number.

77764032406668 is an abundant number, since it is smaller than the sum of its proper divisors (106887923799252).

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

77764032406668 is a wasteful number, since it uses less digits than its factorization.

77764032406668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131317338 (or 131317336 counting only the distinct ones).

The product of its (nonzero) digits is 341397504, while the sum is 66.

The spelling of 77764032406668 in words is "seventy-seven trillion, seven hundred sixty-four billion, thirty-two million, four hundred six thousand, six hundred sixty-eight".