699669720 has 96 divisors (see below), whose sum is σ = 2281471920. Its totient is φ = 185959680.

The previous prime is 699669709. The next prime is 699669743. The reversal of 699669720 is 27966996.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111055 + ... + 117185.

Almost surely, 2^699669720 is an apocalyptic number.

699669720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 699669720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1140735960).

699669720 is an abundant number, since it is smaller than the sum of its proper divisors (1581802200).

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

699669720 is a wasteful number, since it uses less digits than its factorization.

699669720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6465 (or 6458 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 699669720 is about 26451.2706689112. The cubic root of 699669720 is about 887.7643336149.

The spelling of 699669720 in words is "six hundred ninety-nine million, six hundred sixty-nine thousand, seven hundred twenty".