16707661 has 4 divisors (see below), whose sum is σ = 16828000. Its totient is φ = 16587324.

The previous prime is 16707659. The next prime is 16707671. The reversal of 16707661 is 16670761.

It is a happy number.

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 16707661 - 2¹ = 16707659 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 (16707641) 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, 59961 + ... + 60238.

It is an arithmetic number, because the mean of its divisors is an integer number (4207000).

Almost surely, 2^16707661 is an apocalyptic number.

It is an amenable number.

16707661 is a deficient number, since it is larger than the sum of its proper divisors (120339).

16707661 is a wasteful number, since it uses less digits than its factorization.

16707661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120338.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 16707661 is about 4087.5005810397. The cubic root of 16707661 is about 255.6457349528.

The spelling of 16707661 in words is "sixteen million, seven hundred seven thousand, six hundred sixty-one".