16561662 has 24 divisors (see below), whose sum is σ = 35869464. Its totient is φ = 5095584.

The previous prime is 16561661. The next prime is 16561667. The reversal of 16561662 is 26616561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16561661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7153 + ... + 9180.

It is an arithmetic number, because the mean of its divisors is an integer number (1494561).

Almost surely, 2^16561662 is an apocalyptic number.

16561662 is an abundant number, since it is smaller than the sum of its proper divisors (19307802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16561662 is a wasteful number, since it uses less digits than its factorization.

16561662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16364 (or 16351 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 16561662 is about 4069.6021918610. The cubic root of 16561662 is about 254.8989064863.

The spelling of 16561662 in words is "sixteen million, five hundred sixty-one thousand, six hundred sixty-two".