669809582 has 8 divisors (see below), whose sum is σ = 1082000136. Its totient is φ = 309142872.

The previous prime is 669809563. The next prime is 669809597. The reversal of 669809582 is 285908966.

It is a happy number.

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

It is a super-2 number, since 2×669809582² = 897289752278029448, which contains 22 as substring.

It is a congruent number.

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, 12880928 + ... + 12880979.

It is an arithmetic number, because the mean of its divisors is an integer number (135250017).

Almost surely, 2^669809582 is an apocalyptic number.

669809582 is a deficient number, since it is larger than the sum of its proper divisors (412190554).

669809582 is a wasteful number, since it uses less digits than its factorization.

669809582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25761922.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 669809582 is about 25880.6797051391. The cubic root of 669809582 is about 874.9511077987.

The spelling of 669809582 in words is "six hundred sixty-nine million, eight hundred nine thousand, five hundred eighty-two".