16406660 has 12 divisors (see below), whose sum is σ = 34454028. Its totient is φ = 6562656.

The previous prime is 16406653. The next prime is 16406701. The reversal of 16406660 is 6660461.

It can be written as a sum of positive squares in 2 ways, for example, as 8667136 + 7739524 = 2944^2 + 2782^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410147 + ... + 410186.

It is an arithmetic number, because the mean of its divisors is an integer number (2871169).

Almost surely, 2^16406660 is an apocalyptic number.

16406660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16406660 is an abundant number, since it is smaller than the sum of its proper divisors (18047368).

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

16406660 is a wasteful number, since it uses less digits than its factorization.

16406660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820342 (or 820340 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 16406660 is about 4050.5135476875. The cubic root of 16406660 is about 254.1012058718.

The spelling of 16406660 in words is "sixteen million, four hundred six thousand, six hundred sixty".