720997662 has 64 divisors (see below), whose sum is σ = 1834560000. Its totient is φ = 187266240.

The previous prime is 720997649. The next prime is 720997679. The reversal of 720997662 is 266799027.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6714 + ... + 38562.

It is an arithmetic number, because the mean of its divisors is an integer number (28665000).

Almost surely, 2^720997662 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 720997662, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917280000).

720997662 is an abundant number, since it is smaller than the sum of its proper divisors (1113562338).

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

720997662 is a wasteful number, since it uses less digits than its factorization.

720997662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31886 (or 31872 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 48.

The square root of 720997662 is about 26851.3996283248. The cubic root of 720997662 is about 896.6947329944.

The spelling of 720997662 in words is "seven hundred twenty million, nine hundred ninety-seven thousand, six hundred sixty-two".