16616745 has 40 divisors (see below), whose sum is σ = 30187080. Its totient is φ = 8743680.

The previous prime is 16616731. The next prime is 16616759. The reversal of 16616745 is 54761661.

It is an interprime number because it is at equal distance from previous prime (16616731) and next prime (16616759).

It can be written as a sum of positive squares in 4 ways, for example, as 68121 + 16548624 = 261^2 + 4068^2 .

It is not a de Polignac number, because 16616745 - 2⁴ = 16616729 is a prime.

It is a super-2 number, since 2×16616745² = 552232428790050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35815 + ... + 36275.

It is an arithmetic number, because the mean of its divisors is an integer number (754677).

Almost surely, 2^16616745 is an apocalyptic number.

16616745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16616745 is a deficient number, since it is larger than the sum of its proper divisors (13570335).

16616745 is an equidigital number, since it uses as much as digits as its factorization.

16616745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 558 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 16616745 is about 4076.3641888330. The cubic root of 16616745 is about 255.1811861096.

The spelling of 16616745 in words is "sixteen million, six hundred sixteen thousand, seven hundred forty-five".