669737 has 8 divisors (see below), whose sum is σ = 718656. Its totient is φ = 622512.

The previous prime is 669733. The next prime is 669763. The reversal of 669737 is 737966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 669737 - 2² = 669733 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 669737.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669737.

It is not an unprimeable number, because it can be changed into a prime (669733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 458 + ... + 1244.

It is an arithmetic number, because the mean of its divisors is an integer number (89832).

2⁶⁶⁹⁷³⁷ is an apocalyptic number.

It is an amenable number.

669737 is a deficient number, since it is larger than the sum of its proper divisors (48919).

669737 is a wasteful number, since it uses less digits than its factorization.

669737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847.

The product of its digits is 47628, while the sum is 38.

The square root of 669737 is about 818.3746085993. The cubic root of 669737 is about 87.4919502799.

The spelling of 669737 in words is "six hundred sixty-nine thousand, seven hundred thirty-seven".