669770 has 8 divisors (see below), whose sum is σ = 1205604. Its totient is φ = 267904.

The previous prime is 669763. The next prime is 669787. The reversal of 669770 is 77966.

It can be written as a sum of positive squares in 2 ways, for example, as 573049 + 96721 = 757^2 + 311^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 669770.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 669770.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33479 + ... + 33498.

2⁶⁶⁹⁷⁷⁰ is an apocalyptic number.

669770 is a deficient number, since it is larger than the sum of its proper divisors (535834).

669770 is a wasteful number, since it uses less digits than its factorization.

669770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66984.

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 669770 is about 818.3947702668. The cubic root of 669770 is about 87.4933872554.

The spelling of 669770 in words is "six hundred sixty-nine thousand, seven hundred seventy".