669048210420 has 96 divisors (see below), whose sum is σ = 1909399226112. Its totient is φ = 174980702208.

The previous prime is 669048210409. The next prime is 669048210427. The reversal of 669048210420 is 24012840966.

669048210420 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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (669048210427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8716329 + ... + 8792751.

It is an arithmetic number, because the mean of its divisors is an integer number (19889575272).

Almost surely, 2^669048210420 is an apocalyptic number.

669048210420 is a gapful number since it is divisible by the number (60) 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 669048210420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (954699613056).

669048210420 is an abundant number, since it is smaller than the sum of its proper divisors (1240351015692).

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

669048210420 is a wasteful number, since it uses less digits than its factorization.

669048210420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79241 (or 79239 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The spelling of 669048210420 in words is "six hundred sixty-nine billion, forty-eight million, two hundred ten thousand, four hundred twenty".