16666942 has 4 divisors (see below), whose sum is σ = 25000416. Its totient is φ = 8333470.

The previous prime is 16666931. The next prime is 16666957. The reversal of 16666942 is 24966661.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 16666895 and 16666904.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4166734 + ... + 4166737.

It is an arithmetic number, because the mean of its divisors is an integer number (6250104).

Almost surely, 2^16666942 is an apocalyptic number.

16666942 is a deficient number, since it is larger than the sum of its proper divisors (8333474).

16666942 is an equidigital number, since it uses as much as digits as its factorization.

16666942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8333473.

The product of its digits is 93312, while the sum is 40.

The square root of 16666942 is about 4082.5166258082. The cubic root of 16666942 is about 255.4378840603.

The spelling of 16666942 in words is "sixteen million, six hundred sixty-six thousand, nine hundred forty-two".