720700216566 has 32 divisors (see below), whose sum is σ = 1575719654400. Its totient is φ = 217938058080.

The previous prime is 720700216519. The next prime is 720700216679. The reversal of 720700216566 is 665612007027.

It is a congruent number.

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, 11366821 + ... + 11430048.

It is an arithmetic number, because the mean of its divisors is an integer number (49241239200).

Almost surely, 2^720700216566 is an apocalyptic number.

720700216566 is an abundant number, since it is smaller than the sum of its proper divisors (855019437834).

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

720700216566 is a wasteful number, since it uses less digits than its factorization.

720700216566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22797364.

The product of its (nonzero) digits is 211680, while the sum is 42.

The spelling of 720700216566 in words is "seven hundred twenty billion, seven hundred million, two hundred sixteen thousand, five hundred sixty-six".