780666000 has 160 divisors (see below), whose sum is σ = 2626760448. Its totient is φ = 199091200.

The previous prime is 780665999. The next prime is 780666043. The reversal of 780666000 is 666087.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135172 + ... + 140828.

Almost surely, 2^780666000 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 780666000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1313380224).

780666000 is an abundant number, since it is smaller than the sum of its proper divisors (1846094448).

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

780666000 is a wasteful number, since it uses less digits than its factorization.

780666000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5706 (or 5690 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 780666000 is about 27940.4008561080. The cubic root of 780666000 is about 920.7783268512.

The spelling of 780666000 in words is "seven hundred eighty million, six hundred sixty-six thousand".