16040661 has 16 divisors (see below), whose sum is σ = 26323584. Its totient is φ = 8460864.

The previous prime is 16040659. The next prime is 16040669. The reversal of 16040661 is 16604061.

It is not a de Polignac number, because 16040661 - 2¹ = 16040659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16040669) 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 15 ways as a sum of consecutive naturals, for example, 29106 + ... + 29651.

It is an arithmetic number, because the mean of its divisors is an integer number (1645224).

Almost surely, 2^16040661 is an apocalyptic number.

It is an amenable number.

16040661 is a deficient number, since it is larger than the sum of its proper divisors (10282923).

16040661 is a wasteful number, since it uses less digits than its factorization.

16040661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58780.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 16040661 is about 4005.0793999620. The cubic root of 16040661 is about 252.1974862878.

The spelling of 16040661 in words is "sixteen million, forty thousand, six hundred sixty-one".