16552665 has 24 divisors (see below), whose sum is σ = 29020680. Its totient is φ = 8726784.

The previous prime is 16552651. The next prime is 16552681. The reversal of 16552665 is 56625561.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1272384 + 15280281 = 1128^2 + 3909^2 .

It is not a de Polignac number, because 16552665 - 2⁹ = 16552153 is a prime.

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 an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1939 + ... + 6071.

It is an arithmetic number, because the mean of its divisors is an integer number (1209195).

Almost surely, 2^16552665 is an apocalyptic number.

16552665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16552665 is a deficient number, since it is larger than the sum of its proper divisors (12468015).

16552665 is a wasteful number, since it uses less digits than its factorization.

16552665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233 (or 4230 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 16552665 is about 4068.4966510985. The cubic root of 16552665 is about 254.8527408123.

The spelling of 16552665 in words is "sixteen million, five hundred fifty-two thousand, six hundred sixty-five".