16666651170 has 96 divisors (see below), whose sum is σ = 47306134512. Its totient is φ = 4046340096.

The previous prime is 16666651151. The next prime is 16666651171. The reversal of 16666651170 is 7115666661.

It can be written as a sum of positive squares in 8 ways, for example, as 8315798481 + 8350852689 = 91191^2 + 91383^2 .

It is a super-2 number, since 2×16666651170² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (16666651171) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12159 + ... + 182978.

Almost surely, 2^16666651170 is an apocalyptic number.

16666651170 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 16666651170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23653067256).

16666651170 is an abundant number, since it is smaller than the sum of its proper divisors (30639483342).

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

16666651170 is a wasteful number, since it uses less digits than its factorization.

16666651170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195236 (or 195233 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 16666651170 in words is "sixteen billion, six hundred sixty-six million, six hundred fifty-one thousand, one hundred seventy".