669589146 has 32 divisors (see below), whose sum is σ = 1566292800. Its totient is φ = 211448880.

The previous prime is 669589117. The next prime is 669589147. The reversal of 669589146 is 641985966.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 669589092 and 669589101.

It is not an unprimeable number, because it can be changed into a prime (669589147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325285 + ... + 327336.

It is an arithmetic number, because the mean of its divisors is an integer number (48946650).

Almost surely, 2^669589146 is an apocalyptic number.

669589146 is an abundant number, since it is smaller than the sum of its proper divisors (896703654).

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

669589146 is a wasteful number, since it uses less digits than its factorization.

669589146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652651 (or 652645 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 669589146 is about 25876.4206566519. The cubic root of 669589146 is about 874.8551144052.

The spelling of 669589146 in words is "six hundred sixty-nine million, five hundred eighty-nine thousand, one hundred forty-six".