16681461 has 4 divisors (see below), whose sum is σ = 22241952. Its totient is φ = 11120972.

The previous prime is 16681453. The next prime is 16681477. The reversal of 16681461 is 16418661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 16681461 - 2³ = 16681453 is a prime.

It is a super-2 number, since 2×16681461² = 556542282189042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16681421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2780241 + ... + 2780246.

It is an arithmetic number, because the mean of its divisors is an integer number (5560488).

Almost surely, 2^16681461 is an apocalyptic number.

It is an amenable number.

16681461 is a deficient number, since it is larger than the sum of its proper divisors (5560491).

16681461 is an equidigital number, since it uses as much as digits as its factorization.

16681461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5560490.

The product of its digits is 6912, while the sum is 33.

The square root of 16681461 is about 4084.2944311105. The cubic root of 16681461 is about 255.5120353602.

The spelling of 16681461 in words is "sixteen million, six hundred eighty-one thousand, four hundred sixty-one".