16664674 has 8 divisors (see below), whose sum is σ = 26919900. Its totient is φ = 7691376.

The previous prime is 16664671. The next prime is 16664677. The reversal of 16664674 is 47646661.

It is a happy number.

16664674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16664671) and next prime (16664677).

It can be written as a sum of positive squares in 2 ways, for example, as 16605625 + 59049 = 4075^2 + 243^2 .

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

It is a super-2 number, since 2×16664674² = 555422719052552, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16664671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320449 + ... + 320500.

Almost surely, 2^16664674 is an apocalyptic number.

16664674 is a deficient number, since it is larger than the sum of its proper divisors (10255226).

16664674 is a wasteful number, since it uses less digits than its factorization.

16664674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640964.

The product of its digits is 145152, while the sum is 40.

The square root of 16664674 is about 4082.2388465155. The cubic root of 16664674 is about 255.4262970637.

The spelling of 16664674 in words is "sixteen million, six hundred sixty-four thousand, six hundred seventy-four".