16106066640 has 120 divisors (see below), whose sum is σ = 54300629448. Its totient is φ = 4278190080.

The previous prime is 16106066633. The next prime is 16106066651. The reversal of 16106066640 is 4666060161.

It can be written as a sum of positive squares in 4 ways, for example, as 11853983376 + 4252083264 = 108876^2 + 65208^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×16106066640² (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 junction number, because it is equal to n+sod(n) for n = 16106066595 and 16106066604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 141520 + ... + 228560.

Almost surely, 2^16106066640 is an apocalyptic number.

16106066640 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 16106066640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27150314724).

16106066640 is an abundant number, since it is smaller than the sum of its proper divisors (38194562808).

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

16106066640 is a wasteful number, since it uses less digits than its factorization.

16106066640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87317 (or 87308 counting only the distinct ones).

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

The spelling of 16106066640 in words is "sixteen billion, one hundred six million, sixty-six thousand, six hundred forty".