669347369208 has 320 divisors, whose sum is σ = 2197933056000. Its totient is φ = 190228772160.

The previous prime is 669347369129. The next prime is 669347369267. The reversal of 669347369208 is 802963743966.

669347369208 is a `hidden beast` number, since 6 + 69 + 3 + 4 + 7 + 369 + 208 = 666.

669347369208 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 42444541 + ... + 42460307.

It is an arithmetic number, because the mean of its divisors is an integer number (6868540800).

Almost surely, 2^669347369208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 669347369208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1098966528000).

669347369208 is an abundant number, since it is smaller than the sum of its proper divisors (1528585686792).

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

669347369208 is a wasteful number, since it uses less digits than its factorization.

669347369208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15997 (or 15970 counting only the distinct ones).

The product of its (nonzero) digits is 70543872, while the sum is 63.

The spelling of 669347369208 in words is "six hundred sixty-nine billion, three hundred forty-seven million, three hundred sixty-nine thousand, two hundred eight".