699666 has 16 divisors (see below), whose sum is σ = 1526688. Its totient is φ = 212000.

The previous prime is 699649. The next prime is 699697. The reversal of 699666 is 666996.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 699666.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5235 + ... + 5366.

It is an arithmetic number, because the mean of its divisors is an integer number (95418).

2⁶⁹⁹⁶⁶⁶ is an apocalyptic number.

699666 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

699666 is an abundant number, since it is smaller than the sum of its proper divisors (827022).

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

699666 is a wasteful number, since it uses less digits than its factorization.

699666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617.

The product of its digits is 104976, while the sum is 42.

The square root of 699666 is about 836.4603995408. The cubic root of 699666 is about 88.7762760259.

The spelling of 699666 in words is "six hundred ninety-nine thousand, six hundred sixty-six".