16561676 has 6 divisors (see below), whose sum is σ = 28982940. Its totient is φ = 8280836.

The previous prime is 16561669. The next prime is 16561691. The reversal of 16561676 is 67616561.

It is a super-2 number, since 2×16561676² = 548578223857952, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2070206 + ... + 2070213.

It is an arithmetic number, because the mean of its divisors is an integer number (4830490).

Almost surely, 2^16561676 is an apocalyptic number.

It is an amenable number.

16561676 is a deficient number, since it is larger than the sum of its proper divisors (12421264).

16561676 is a wasteful number, since it uses less digits than its factorization.

16561676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4140423 (or 4140421 counting only the distinct ones).

The product of its digits is 45360, while the sum is 38.

The square root of 16561676 is about 4069.6039119305. The cubic root of 16561676 is about 254.8989783105.

The spelling of 16561676 in words is "sixteen million, five hundred sixty-one thousand, six hundred seventy-six".