699660 has 108 divisors (see below), whose sum is σ = 2398032. Its totient is φ = 164736.

The previous prime is 699649. The next prime is 699697. The reversal of 699660 is 66996.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 30409 + ... + 30431.

It is an arithmetic number, because the mean of its divisors is an integer number (22204).

2⁶⁹⁹⁶⁶⁰ is an apocalyptic number.

699660 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 699660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199016).

699660 is an abundant number, since it is smaller than the sum of its proper divisors (1698372).

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

699660 is a wasteful number, since it uses less digits than its factorization.

699660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 699660 is about 836.4568129916. The cubic root of 699660 is about 88.7760222576.

It can be divided in two parts, 6996 and 60, that added together give a square (7056 = 84²).

The spelling of 699660 in words is "six hundred ninety-nine thousand, six hundred sixty".