16674557 has 2 divisors, whose sum is σ = 16674558. Its totient is φ = 16674556.

The previous prime is 16674551. The next prime is 16674599. The reversal of 16674557 is 75547661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15007876 + 1666681 = 3874^2 + 1291^2 .

It is a cyclic number.

It is not a de Polignac number, because 16674557 - 2¹⁸ = 16412413 is a prime.

It is a super-2 number, since 2×16674557² = 556081702292498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16674551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8337278 + 8337279.

It is an arithmetic number, because the mean of its divisors is an integer number (8337279).

Almost surely, 2^16674557 is an apocalyptic number.

It is an amenable number.

16674557 is a deficient number, since it is larger than the sum of its proper divisors (1).

16674557 is an equidigital number, since it uses as much as digits as its factorization.

16674557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 41.

The square root of 16674557 is about 4083.4491548200. The cubic root of 16674557 is about 255.4767806841.

The spelling of 16674557 in words is "sixteen million, six hundred seventy-four thousand, five hundred fifty-seven".