16668771 has 32 divisors (see below), whose sum is σ = 26342400. Its totient is φ = 9370368.

The previous prime is 16668749. The next prime is 16668791. The reversal of 16668771 is 17786661.

16668771 is nontrivially palindromic in base 11.

It is not a de Polignac number, because 16668771 - 2¹⁴ = 16652387 is a prime.

Its product of digits (84672) is a multiple of the sum of its prime factors (288).

It is not an unprimeable number, because it can be changed into a prime (16668791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 99730 + ... + 99896.

It is an arithmetic number, because the mean of its divisors is an integer number (823200).

Almost surely, 2^16668771 is an apocalyptic number.

16668771 is a deficient number, since it is larger than the sum of its proper divisors (9673629).

16668771 is an equidigital number, since it uses as much as digits as its factorization.

16668771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 274 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 16668771 is about 4082.7406236498. The cubic root of 16668771 is about 255.4472274820.

The spelling of 16668771 in words is "sixteen million, six hundred sixty-eight thousand, seven hundred seventy-one".