13066666 has 8 divisors (see below), whose sum is σ = 19620900. Its totient is φ = 6526368.

The previous prime is 13066657. The next prime is 13066709. The reversal of 13066666 is 66666031.

It is a happy number.

13066666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11363641 + 1703025 = 3371^2 + 1305^2 .

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

13066666 is a modest number, since divided by 6666 gives 1306 as remainder.

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, 691 + ... + 5158.

Almost surely, 2^13066666 is an apocalyptic number.

13066666 is a deficient number, since it is larger than the sum of its proper divisors (6554234).

13066666 is a wasteful number, since it uses less digits than its factorization.

13066666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 13066666 is about 3614.7843642464. The cubic root of 13066666 is about 235.5347171979.

The spelling of 13066666 in words is "thirteen million, sixty-six thousand, six hundred sixty-six".