16666479 has 10 divisors (see below), whose sum is σ = 24896960. Its totient is φ = 11110932.

The previous prime is 16666453. The next prime is 16666487. The reversal of 16666479 is 97466661.

It is a happy number.

It is not a de Polignac number, because 16666479 - 2¹⁵ = 16633711 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 (16666879) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 102799 + ... + 102960.

It is an arithmetic number, because the mean of its divisors is an integer number (2489696).

Almost surely, 2^16666479 is an apocalyptic number.

16666479 is a deficient number, since it is larger than the sum of its proper divisors (8230481).

16666479 is an equidigital number, since it uses as much as digits as its factorization.

16666479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205771 (or 205762 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 16666479 is about 4082.4599201952. The cubic root of 16666479 is about 255.4355187227.

The spelling of 16666479 in words is "sixteen million, six hundred sixty-six thousand, four hundred seventy-nine".