16861966 has 8 divisors (see below), whose sum is σ = 27592344. Its totient is φ = 7664520.

The previous prime is 16861939. The next prime is 16861981. The reversal of 16861966 is 66916861.

It is a happy number.

16861966 is nontrivially palindromic in base 5.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383205 + ... + 383248.

It is an arithmetic number, because the mean of its divisors is an integer number (3449043).

Almost surely, 2^16861966 is an apocalyptic number.

16861966 is a deficient number, since it is larger than the sum of its proper divisors (10730378).

16861966 is a wasteful number, since it uses less digits than its factorization.

16861966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766466.

The product of its digits is 93312, while the sum is 43.

The square root of 16861966 is about 4106.3324268744. The cubic root of 16861966 is about 256.4303369875.

The spelling of 16861966 in words is "sixteen million, eight hundred sixty-one thousand, nine hundred sixty-six".