162686666 has 4 divisors (see below), whose sum is σ = 244030002. Its totient is φ = 81343332.

The previous prime is 162686663. The next prime is 162686681. The reversal of 162686666 is 666686261.

162686666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666686261 = 1163 ⋅573247.

It can be written as a sum of positive squares in only one way, i.e., 141110641 + 21576025 = 11879^2 + 4645^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 162686666.

It is not an unprimeable number, because it can be changed into a prime (162686663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40671665 + ... + 40671668.

Almost surely, 2^162686666 is an apocalyptic number.

162686666 is a deficient number, since it is larger than the sum of its proper divisors (81343336).

162686666 is an equidigital number, since it uses as much as digits as its factorization.

162686666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81343335.

The product of its digits is 746496, while the sum is 47.

The square root of 162686666 is about 12754.8683254669. The cubic root of 162686666 is about 545.9053112598.

The spelling of 162686666 in words is "one hundred sixty-two million, six hundred eighty-six thousand, six hundred sixty-six".