16670661 has 8 divisors (see below), whose sum is σ = 25402944. Its totient is φ = 9526080.

The previous prime is 16670639. The next prime is 16670663. The reversal of 16670661 is 16607661.

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

It is not a de Polignac number, because 16670661 - 2⁶ = 16670597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16670663) 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, 396900 + ... + 396941.

It is an arithmetic number, because the mean of its divisors is an integer number (3175368).

Almost surely, 2^16670661 is an apocalyptic number.

It is an amenable number.

16670661 is a deficient number, since it is larger than the sum of its proper divisors (8732283).

16670661 is an equidigital number, since it uses as much as digits as its factorization.

16670661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793851.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 16670661 is about 4082.9720792580. The cubic root of 16670661 is about 255.4568818033.

The spelling of 16670661 in words is "sixteen million, six hundred seventy thousand, six hundred sixty-one".