16746661 has 4 divisors (see below), whose sum is σ = 16948512. Its totient is φ = 16544812.

The previous prime is 16746643. The next prime is 16746671. The reversal of 16746661 is 16664761.

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 16746661 - 2¹⁷ = 16615589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16746661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16746641) 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, 100801 + ... + 100966.

It is an arithmetic number, because the mean of its divisors is an integer number (4237128).

Almost surely, 2^16746661 is an apocalyptic number.

It is an amenable number.

16746661 is a deficient number, since it is larger than the sum of its proper divisors (201851).

16746661 is an equidigital number, since it uses as much as digits as its factorization.

16746661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201850.

The product of its digits is 36288, while the sum is 37.

The square root of 16746661 is about 4092.2684418303. The cubic root of 16746661 is about 255.8444947921.

The spelling of 16746661 in words is "sixteen million, seven hundred forty-six thousand, six hundred sixty-one".