669487 has 12 divisors (see below), whose sum is σ = 839496. Its totient is φ = 529200.

The previous prime is 669481. The next prime is 669527. The reversal of 669487 is 784966.

It is not a de Polignac number, because 669487 - 2³ = 669479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112 + ... + 1162.

It is an arithmetic number, because the mean of its divisors is an integer number (69958).

2⁶⁶⁹⁴⁸⁷ is an apocalyptic number.

669487 is a deficient number, since it is larger than the sum of its proper divisors (170009).

669487 is a wasteful number, since it uses less digits than its factorization.

669487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1071 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The square root of 669487 is about 818.2218525559. The cubic root of 669487 is about 87.4810625684.

It can be divided in two parts, 669 and 487, that added together give a square (1156 = 34²).

The spelling of 669487 in words is "six hundred sixty-nine thousand, four hundred eighty-seven".