669691050 has 96 divisors (see below), whose sum is σ = 1924317312. Its totient is φ = 150958080.

The previous prime is 669691049. The next prime is 669691067. The reversal of 669691050 is 50196966.

It is a super-2 number, since 2×669691050² = 896972204900205000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 669690993 and 669691011.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 72282 + ... + 81018.

It is an arithmetic number, because the mean of its divisors is an integer number (20044972).

Almost surely, 2^669691050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669691050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (962158656).

669691050 is an abundant number, since it is smaller than the sum of its proper divisors (1254626262).

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

669691050 is a wasteful number, since it uses less digits than its factorization.

669691050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8832 (or 8827 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 669691050 is about 25878.3896330510. The cubic root of 669691050 is about 874.8994932176.

The spelling of 669691050 in words is "six hundred sixty-nine million, six hundred ninety-one thousand, fifty".