780102664 has 64 divisors (see below), whose sum is σ = 1698744960. Its totient is φ = 331914240.

The previous prime is 780102629. The next prime is 780102671. The reversal of 780102664 is 466201087.

It is a super-4 number, since 4×780102664⁴ (a number of 37 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

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, 293389 + ... + 296035.

It is an arithmetic number, because the mean of its divisors is an integer number (26542890).

Almost surely, 2^780102664 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 780102664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (849372480).

780102664 is an abundant number, since it is smaller than the sum of its proper divisors (918642296).

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

780102664 is a wasteful number, since it uses less digits than its factorization.

780102664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878 (or 2874 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 780102664 is about 27930.3180074986. The cubic root of 780102664 is about 920.5567927604.

The spelling of 780102664 in words is "seven hundred eighty million, one hundred two thousand, six hundred sixty-four".