16137661 has 8 divisors (see below), whose sum is σ = 16809984. Its totient is φ = 15477840.

The previous prime is 16137637. The next prime is 16137673. The reversal of 16137661 is 16673161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16137661 - 2⁵ = 16137629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16137691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 445 + ... + 5698.

It is an arithmetic number, because the mean of its divisors is an integer number (2101248).

Almost surely, 2^16137661 is an apocalyptic number.

It is an amenable number.

16137661 is a deficient number, since it is larger than the sum of its proper divisors (672323).

16137661 is an equidigital number, since it uses as much as digits as its factorization.

16137661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251.

The product of its digits is 4536, while the sum is 31.

The square root of 16137661 is about 4017.1707705797. The cubic root of 16137661 is about 252.7048222078.

The spelling of 16137661 in words is "sixteen million, one hundred thirty-seven thousand, six hundred sixty-one".