16340661 has 6 divisors (see below), whose sum is σ = 23603190. Its totient is φ = 10893768.

The previous prime is 16340657. The next prime is 16340663. The reversal of 16340661 is 16604361.

It can be written as a sum of positive squares in only one way, i.e., 14676561 + 1664100 = 3831^2 + 1290^2 .

It is not a de Polignac number, because 16340661 - 2² = 16340657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16340663) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 907806 + ... + 907823.

It is an arithmetic number, because the mean of its divisors is an integer number (3933865).

Almost surely, 2^16340661 is an apocalyptic number.

It is an amenable number.

16340661 is a deficient number, since it is larger than the sum of its proper divisors (7262529).

16340661 is a wasteful number, since it uses less digits than its factorization.

16340661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1815635 (or 1815632 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 16340661 is about 4042.3583463122. The cubic root of 16340661 is about 253.7600240323.

The spelling of 16340661 in words is "sixteen million, three hundred forty thousand, six hundred sixty-one".