694661 has 6 divisors (see below), whose sum is σ = 763686. Its totient is φ = 631400.

The previous prime is 694651. The next prime is 694717. The reversal of 694661 is 166496.

It can be written as a sum of positive squares in only one way, i.e., 592900 + 101761 = 770^2 + 319^2 .

It is not a de Polignac number, because 694661 - 2⁶ = 694597 is a prime.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (694651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2750 + ... + 2991.

It is an arithmetic number, because the mean of its divisors is an integer number (127281).

2⁶⁹⁴⁶⁶¹ is an apocalyptic number.

It is an amenable number.

694661 is a deficient number, since it is larger than the sum of its proper divisors (69025).

694661 is a wasteful number, since it uses less digits than its factorization.

694661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5763 (or 5752 counting only the distinct ones).

The product of its digits is 7776, while the sum is 32.

The square root of 694661 is about 833.4632565386. The cubic root of 694661 is about 88.5640847932.

It can be divided in two parts, 6946 and 61, that added together give a palindrome (7007).

The spelling of 694661 in words is "six hundred ninety-four thousand, six hundred sixty-one".