16665764 has 12 divisors (see below), whose sum is σ = 29466444. Its totient is φ = 8246784.

The previous prime is 16665751. The next prime is 16665769. The reversal of 16665764 is 46756661.

It can be written as a sum of positive squares in 2 ways, for example, as 3648100 + 13017664 = 1910^2 + 3608^2 .

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (16665769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21089 + ... + 21864.

It is an arithmetic number, because the mean of its divisors is an integer number (2455537).

Almost surely, 2^16665764 is an apocalyptic number.

It is an amenable number.

16665764 is a deficient number, since it is larger than the sum of its proper divisors (12800680).

16665764 is a wasteful number, since it uses less digits than its factorization.

16665764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43054 (or 43052 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 16665764 is about 4082.3723495046. The cubic root of 16665764 is about 255.4318659014.

The spelling of 16665764 in words is "sixteen million, six hundred sixty-five thousand, seven hundred sixty-four".