16012661 has 12 divisors (see below), whose sum is σ = 18768960. Its totient is φ = 13620600.

The previous prime is 16012651. The next prime is 16012679. The reversal of 16012661 is 16621061.

It is a de Polignac number, because none of the positive numbers 2^k-16012661 is a prime.

It is a super-3 number, since 3×16012661³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16012651) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5636 + ... + 7986.

It is an arithmetic number, because the mean of its divisors is an integer number (1564080).

Almost surely, 2^16012661 is an apocalyptic number.

It is an amenable number.

16012661 is a deficient number, since it is larger than the sum of its proper divisors (2756299).

16012661 is a wasteful number, since it uses less digits than its factorization.

16012661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2504 (or 2497 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 16012661 is about 4001.5823120361. The cubic root of 16012661 is about 252.0506585399.

Subtracting 16012661 from its reverse (16621061), we obtain a square (608400 = 780²).

It can be divided in two parts, 160 and 12661, that added together give a palindrome (12821).

The spelling of 16012661 in words is "sixteen million, twelve thousand, six hundred sixty-one".