16661477 has 8 divisors (see below), whose sum is σ = 19656192. Its totient is φ = 13820400.

The previous prime is 16661471. The next prime is 16661483. The reversal of 16661477 is 77416661.

It is an interprime number because it is at equal distance from previous prime (16661471) and next prime (16661483).

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

It is a cyclic number.

It is not a de Polignac number, because 16661477 - 2⁸ = 16661221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16661477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16661471) 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, 38174 + ... + 38607.

It is an arithmetic number, because the mean of its divisors is an integer number (2457024).

Almost surely, 2^16661477 is an apocalyptic number.

It is an amenable number.

16661477 is a deficient number, since it is larger than the sum of its proper divisors (2994715).

16661477 is an equidigital number, since it uses as much as digits as its factorization.

16661477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76819.

The product of its digits is 42336, while the sum is 38.

The square root of 16661477 is about 4081.8472533891. The cubic root of 16661477 is about 255.4099621088.

The spelling of 16661477 in words is "sixteen million, six hundred sixty-one thousand, four hundred seventy-seven".