669415650 has 24 divisors (see below), whose sum is σ = 1660151184. Its totient is φ = 178510800.

The previous prime is 669415639. The next prime is 669415673. The reversal of 669415650 is 56514966.

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 11 ways as a sum of consecutive naturals, for example, 2231236 + ... + 2231535.

It is an arithmetic number, because the mean of its divisors is an integer number (69172966).

Almost surely, 2^669415650 is an apocalyptic number.

669415650 is an abundant number, since it is smaller than the sum of its proper divisors (990735534).

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

669415650 is a wasteful number, since it uses less digits than its factorization.

669415650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4462786 (or 4462781 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 669415650 is about 25873.0680438173. The cubic root of 669415650 is about 874.7795471835.

The spelling of 669415650 in words is "six hundred sixty-nine million, four hundred fifteen thousand, six hundred fifty".