16534661 has 16 divisors (see below), whose sum is σ = 19884480. Its totient is φ = 13547520.

The previous prime is 16534657. The next prime is 16534663. The reversal of 16534661 is 16643561.

16534661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 16534661 - 2² = 16534657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16534663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4805 + ... + 7493.

It is an arithmetic number, because the mean of its divisors is an integer number (1242780).

Almost surely, 2^16534661 is an apocalyptic number.

16534661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16534661 is a deficient number, since it is larger than the sum of its proper divisors (3349819).

16534661 is a wasteful number, since it uses less digits than its factorization.

16534661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2756.

The product of its digits is 12960, while the sum is 32.

The square root of 16534661 is about 4066.2834382271. The cubic root of 16534661 is about 254.7603078957.

Subtracting 16534661 from its reverse (16643561), we obtain a square (108900 = 330²).

The spelling of 16534661 in words is "sixteen million, five hundred thirty-four thousand, six hundred sixty-one".