770888664 has 320 divisors, whose sum is σ = 2817460800. Its totient is φ = 191102976.

The previous prime is 770888609. The next prime is 770888707. The reversal of 770888664 is 466888077.

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

It is a self number, because there is not a number n which added to its sum of digits gives 770888664.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1002072 + ... + 1002840.

It is an arithmetic number, because the mean of its divisors is an integer number (8804565).

Almost surely, 2^770888664 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 770888664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1408730400).

770888664 is an abundant number, since it is smaller than the sum of its proper divisors (2046572136).

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

770888664 is a wasteful number, since it uses less digits than its factorization.

770888664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 811 counting only the distinct ones).

The product of its (nonzero) digits is 3612672, while the sum is 54.

The square root of 770888664 is about 27764.8818473985. The cubic root of 770888664 is about 916.9181154528.

The spelling of 770888664 in words is "seven hundred seventy million, eight hundred eighty-eight thousand, six hundred sixty-four".