16691061 has 8 divisors (see below), whose sum is σ = 22459360. Its totient is φ = 11025072.

The previous prime is 16691053. The next prime is 16691069. The reversal of 16691061 is 16019661.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16691053) and next prime (16691069).

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

It is not a de Polignac number, because 16691061 - 2³ = 16691053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16691069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25195 + ... + 25848.

It is an arithmetic number, because the mean of its divisors is an integer number (2807420).

Almost surely, 2^16691061 is an apocalyptic number.

It is an amenable number.

16691061 is a deficient number, since it is larger than the sum of its proper divisors (5768299).

16691061 is a wasteful number, since it uses less digits than its factorization.

16691061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51155.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 16691061 is about 4085.4694956639. The cubic root of 16691061 is about 255.5610407630.

The spelling of 16691061 in words is "sixteen million, six hundred ninety-one thousand, sixty-one".