1669113100720 has 80 divisors (see below), whose sum is σ = 4203931868640. Its totient is φ = 616287849216.

The previous prime is 1669113100661. The next prime is 1669113100729. The reversal of 1669113100720 is 270013119661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 1669113100720.

It is not an unprimeable number, because it can be changed into a prime (1669113100729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4572514 + ... + 4924033.

It is an arithmetic number, because the mean of its divisors is an integer number (52549148358).

Almost surely, 2^{1669113100720} is an apocalyptic number.

1669113100720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1669113100720 is an abundant number, since it is smaller than the sum of its proper divisors (2534818767920).

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

1669113100720 is an equidigital number, since it uses as much as digits as its factorization.

1669113100720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9496599 (or 9496567 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 1669113100720 in words is "one trillion, six hundred sixty-nine billion, one hundred thirteen million, one hundred thousand, seven hundred twenty".