16667994 has 32 divisors (see below), whose sum is σ = 38286720. Its totient is φ = 4738752.

The previous prime is 16667983. The next prime is 16667999. The reversal of 16667994 is 49976661.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16667999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8752 + ... + 10484.

It is an arithmetic number, because the mean of its divisors is an integer number (1196460).

Almost surely, 2^16667994 is an apocalyptic number.

16667994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16667994 is an abundant number, since it is smaller than the sum of its proper divisors (21618726).

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

16667994 is a wasteful number, since it uses less digits than its factorization.

16667994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974.

The product of its digits is 489888, while the sum is 48.

The square root of 16667994 is about 4082.6454658714. The cubic root of 16667994 is about 255.4432582715.

The spelling of 16667994 in words is "sixteen million, six hundred sixty-seven thousand, nine hundred ninety-four".