669100050 has 72 divisors (see below), whose sum is σ = 1801719504. Its totient is φ = 178022880.

The previous prime is 669100049. The next prime is 669100057. The reversal of 669100050 is 50001966.

It is a junction number, because it is equal to n+sod(n) for n = 669099987 and 669100023.

It is not an unprimeable number, because it can be changed into a prime (669100057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 233929 + ... + 236771.

It is an arithmetic number, because the mean of its divisors is an integer number (25023882).

Almost surely, 2^669100050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669100050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (900859752).

669100050 is an abundant number, since it is smaller than the sum of its proper divisors (1132619454).

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

669100050 is a wasteful number, since it uses less digits than its factorization.

669100050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384 (or 3376 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 669100050 is about 25866.9683186878. The cubic root of 669100050 is about 874.6420522290.

The spelling of 669100050 in words is "six hundred sixty-nine million, one hundred thousand, fifty".