669249102 has 32 divisors (see below), whose sum is σ = 1349812224. Its totient is φ = 221205600.

The previous prime is 669249071. The next prime is 669249107. The reversal of 669249102 is 201942966.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669249107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 454227 + ... + 455697.

It is an arithmetic number, because the mean of its divisors is an integer number (42181632).

Almost surely, 2^669249102 is an apocalyptic number.

669249102 is an abundant number, since it is smaller than the sum of its proper divisors (680563122).

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

669249102 is a wasteful number, since it uses less digits than its factorization.

669249102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2064.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 669249102 is about 25869.8492844469. The cubic root of 669249102 is about 874.7069939209.

The spelling of 669249102 in words is "six hundred sixty-nine million, two hundred forty-nine thousand, one hundred two".