669158552 has 16 divisors (see below), whose sum is σ = 1281368160. Its totient is φ = 327460384.

The previous prime is 669158543. The next prime is 669158563. The reversal of 669158552 is 255851966.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a junction number, because it is equal to n+sod(n) for n = 669158497 and 669158506.

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, 889463 + ... + 890214.

It is an arithmetic number, because the mean of its divisors is an integer number (80085510).

Almost surely, 2^669158552 is an apocalyptic number.

It is an amenable number.

669158552 is a deficient number, since it is larger than the sum of its proper divisors (612209608).

669158552 is a wasteful number, since it uses less digits than its factorization.

669158552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779730 (or 1779726 counting only the distinct ones).

The product of its digits is 648000, while the sum is 47.

The square root of 669158552 is about 25868.0991184122. The cubic root of 669158552 is about 874.6675425963.

The spelling of 669158552 in words is "six hundred sixty-nine million, one hundred fifty-eight thousand, five hundred fifty-two".