669496212 has 384 divisors, whose sum is σ = 2322432000. Its totient is φ = 165110400.

The previous prime is 669496207. The next prime is 669496229. The reversal of 669496212 is 212694966.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12631978 + ... + 12632030.

It is an arithmetic number, because the mean of its divisors is an integer number (6048000).

Almost surely, 2^669496212 is an apocalyptic number.

669496212 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669496212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1161216000).

669496212 is an abundant number, since it is smaller than the sum of its proper divisors (1652935788).

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

669496212 is a wasteful number, since it uses less digits than its factorization.

669496212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129 (or 107 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 669496212 is about 25874.6248668459. The cubic root of 669496212 is about 874.8146380686.

The spelling of 669496212 in words is "six hundred sixty-nine million, four hundred ninety-six thousand, two hundred twelve".