696661 has 4 divisors (see below), whose sum is σ = 796192. Its totient is φ = 597132.

The previous prime is 696659. The next prime is 696679. The reversal of 696661 is 166696.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 696661 - 2¹ = 696659 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (696611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49755 + ... + 49768.

It is an arithmetic number, because the mean of its divisors is an integer number (199048).

2⁶⁹⁶⁶⁶¹ is an apocalyptic number.

It is an amenable number.

696661 is a deficient number, since it is larger than the sum of its proper divisors (99531).

696661 is an equidigital number, since it uses as much as digits as its factorization.

696661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99530.

The product of its digits is 11664, while the sum is 34.

The square root of 696661 is about 834.6622071233. The cubic root of 696661 is about 88.6489983702.

The spelling of 696661 in words is "six hundred ninety-six thousand, six hundred sixty-one".