16662251250 has 90 divisors (see below), whose sum is σ = 45149588913. Its totient is φ = 4439616000.

The previous prime is 16662251231. The next prime is 16662251251. The reversal of 16662251250 is 5215226661.

It can be written as a sum of positive squares in 8 ways, for example, as 3169802601 + 13492448649 = 56301^2 + 116157^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=91275.

It is not an unprimeable number, because it can be changed into a prime (16662251251) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 13690642 + ... + 13691858.

Almost surely, 2^16662251250 is an apocalyptic number.

16662251250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16662251250

16662251250 is an abundant number, since it is smaller than the sum of its proper divisors (28487337663).

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

16662251250 is an frugal number, since it uses more digits than its factorization.

16662251250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2462 (or 1227 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 16662251250 in words is "sixteen billion, six hundred sixty-two million, two hundred fifty-one thousand, two hundred fifty".