669412 has 12 divisors (see below), whose sum is σ = 1182636. Its totient is φ = 331520.

The previous prime is 669401. The next prime is 669413. The reversal of 669412 is 214966.

669412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 112896 + 556516 = 336^2 + 746^2 .

It is a super-2 number, since 2×669412² = 896224851488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (669413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 289 + ... + 1192.

It is an arithmetic number, because the mean of its divisors is an integer number (98553).

2⁶⁶⁹⁴¹² is an apocalyptic number.

It is an amenable number.

669412 is a deficient number, since it is larger than the sum of its proper divisors (513224).

669412 is a wasteful number, since it uses less digits than its factorization.

669412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 1596 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 669412 is about 818.1760201815. The cubic root of 669412 is about 87.4777957264.

It can be divided in two parts, 669 and 412, that added together give a triangular number (1081 = T₄₆).

The spelling of 669412 in words is "six hundred sixty-nine thousand, four hundred twelve".