16668477 has 48 divisors (see below), whose sum is σ = 29494080. Its totient is φ = 9271584.

The previous prime is 16668469. The next prime is 16668479. The reversal of 16668477 is 77486661.

It is not a de Polignac number, because 16668477 - 2³ = 16668469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16668479) 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 47 ways as a sum of consecutive naturals, for example, 56743 + ... + 57035.

It is an arithmetic number, because the mean of its divisors is an integer number (614460).

Almost surely, 2^16668477 is an apocalyptic number.

It is an amenable number.

16668477 is a deficient number, since it is larger than the sum of its proper divisors (12825603).

16668477 is a wasteful number, since it uses less digits than its factorization.

16668477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 346 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 16668477 is about 4082.7046182647. The cubic root of 16668477 is about 255.4457256331.

The spelling of 16668477 in words is "sixteen million, six hundred sixty-eight thousand, four hundred seventy-seven".