16301661 has 4 divisors (see below), whose sum is σ = 21735552. Its totient is φ = 10867772.

The previous prime is 16301633. The next prime is 16301689. The reversal of 16301661 is 16610361.

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 an interprime number because it is at equal distance from previous prime (16301633) and next prime (16301689).

It is a cyclic number.

It is not a de Polignac number, because 16301661 - 2⁷ = 16301533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16301611) 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, 2716941 + ... + 2716946.

It is an arithmetic number, because the mean of its divisors is an integer number (5433888).

Almost surely, 2^16301661 is an apocalyptic number.

It is an amenable number.

16301661 is a deficient number, since it is larger than the sum of its proper divisors (5433891).

16301661 is an equidigital number, since it uses as much as digits as its factorization.

16301661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433890.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 16301661 is about 4037.5315478644. The cubic root of 16301661 is about 253.5579815164.

The spelling of 16301661 in words is "sixteen million, three hundred one thousand, six hundred sixty-one".