16166004660 has 144 divisors (see below), whose sum is σ = 52899262416. Its totient is φ = 3972519936.

The previous prime is 16166004619. The next prime is 16166004689. The reversal of 16166004660 is 6640066161.

16166004660 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 600 + 46 + 6 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 6969578256 + 9196426404 = 83484^2 + 95898^2 .

It is a super-2 number, since 2×16166004660² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1438182 + ... + 1449378.

It is an arithmetic number, because the mean of its divisors is an integer number (367355989).

Almost surely, 2^16166004660 is an apocalyptic number.

16166004660 is a gapful number since it is divisible by the number (10) 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 16166004660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26449631208).

16166004660 is an abundant number, since it is smaller than the sum of its proper divisors (36733257756).

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

16166004660 is a wasteful number, since it uses less digits than its factorization.

16166004660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11842 (or 11837 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 16166004660 in words is "sixteen billion, one hundred sixty-six million, four thousand, six hundred sixty".