669970 has 32 divisors (see below), whose sum is σ = 1461888. Its totient is φ = 215808.

The previous prime is 669947. The next prime is 669971. The reversal of 669970 is 79966.

It is not an unprimeable number, because it can be changed into a prime (669971) by changing a digit.

669970 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 909 + ... + 1471.

It is an arithmetic number, because the mean of its divisors is an integer number (45684).

2⁶⁶⁹⁹⁷⁰ is an apocalyptic number.

669970 is an abundant number, since it is smaller than the sum of its proper divisors (791918).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

669970 is a wasteful number, since it uses less digits than its factorization.

669970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 594.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 669970 is about 818.5169515655. The cubic root of 669970 is about 87.5020951879.

The spelling of 669970 in words is "six hundred sixty-nine thousand, nine hundred seventy".