16556974 has 16 divisors (see below), whose sum is σ = 28435968. Its totient is φ = 7082712.

The previous prime is 16556957. The next prime is 16556977. The reversal of 16556974 is 47965561.

It is a self number, because there is not a number n which added to its sum of digits gives 16556974.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16556977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12927 + ... + 14149.

It is an arithmetic number, because the mean of its divisors is an integer number (1777248).

Almost surely, 2^16556974 is an apocalyptic number.

16556974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16556974 is a deficient number, since it is larger than the sum of its proper divisors (11878994).

16556974 is a wasteful number, since it uses less digits than its factorization.

16556974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199.

The product of its digits is 226800, while the sum is 43.

The square root of 16556974 is about 4069.0261734228. The cubic root of 16556974 is about 254.8748533681.

The spelling of 16556974 in words is "sixteen million, five hundred fifty-six thousand, nine hundred seventy-four".