16665494 has 8 divisors (see below), whose sum is σ = 25422120. Its totient is φ = 8191456.

The previous prime is 16665469. The next prime is 16665497. The reversal of 16665494 is 49456661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16665497) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70499 + ... + 70734.

It is an arithmetic number, because the mean of its divisors is an integer number (3177765).

Almost surely, 2^16665494 is an apocalyptic number.

16665494 is a deficient number, since it is larger than the sum of its proper divisors (8756626).

16665494 is a wasteful number, since it uses less digits than its factorization.

16665494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141294.

The product of its digits is 155520, while the sum is 41.

The square root of 16665494 is about 4082.3392803636. The cubic root of 16665494 is about 255.4304864872.

The spelling of 16665494 in words is "sixteen million, six hundred sixty-five thousand, four hundred ninety-four".