693666 has 24 divisors (see below), whose sum is σ = 1523340. Its totient is φ = 228096.

The previous prime is 693661. The next prime is 693677. The reversal of 693666 is 666396.

It can be written as a sum of positive squares in 2 ways, for example, as 594441 + 99225 = 771^2 + 315^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 693666.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 693666.

It is not an unprimeable number, because it can be changed into a prime (693661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1386 + ... + 1818.

2⁶⁹³⁶⁶⁶ is an apocalyptic number.

693666 is an abundant number, since it is smaller than the sum of its proper divisors (829674).

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

693666 is a wasteful number, since it uses less digits than its factorization.

693666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530 (or 527 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 693666 is about 832.8661357025. The cubic root of 693666 is about 88.5217795674.

The spelling of 693666 in words is "six hundred ninety-three thousand, six hundred sixty-six".