669572 has 6 divisors (see below), whose sum is σ = 1171758. Its totient is φ = 334784.

The previous prime is 669551. The next prime is 669577. The reversal of 669572 is 275966.

It can be written as a sum of positive squares in only one way, i.e., 454276 + 215296 = 674^2 + 464^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669572.

It is not an unprimeable number, because it can be changed into a prime (669577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83693 + ... + 83700.

It is an arithmetic number, because the mean of its divisors is an integer number (195293).

2⁶⁶⁹⁵⁷² is an apocalyptic number.

It is an amenable number.

669572 is a deficient number, since it is larger than the sum of its proper divisors (502186).

669572 is a wasteful number, since it uses less digits than its factorization.

669572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167397 (or 167395 counting only the distinct ones).

The product of its digits is 22680, while the sum is 35.

The square root of 669572 is about 818.2737928102. The cubic root of 669572 is about 87.4847646944.

The spelling of 669572 in words is "six hundred sixty-nine thousand, five hundred seventy-two".