20166602 has 8 divisors (see below), whose sum is σ = 30269316. Its totient is φ = 10076832.

The previous prime is 20166583. The next prime is 20166617. The reversal of 20166602 is 20666102.

It can be written as a sum of positive squares in 2 ways, for example, as 12609601 + 7557001 = 3551^2 + 2749^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3308 + ... + 7160.

Almost surely, 2^20166602 is an apocalyptic number.

20166602 is a deficient number, since it is larger than the sum of its proper divisors (10102714).

20166602 is a wasteful number, since it uses less digits than its factorization.

20166602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20166602 is about 4490.7239950814. The cubic root of 20166602 is about 272.1933907979.

Subtracting 20166602 from its reverse (20666102), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 20166602 in words is "twenty million, one hundred sixty-six thousand, six hundred two".