13420666 has 16 divisors (see below), whose sum is σ = 23267520. Its totient is φ = 5686560.

The previous prime is 13420663. The next prime is 13420691. The reversal of 13420666 is 66602431.

13420666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13420666² = 360228551767112, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13420663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4140 + ... + 6631.

It is an arithmetic number, because the mean of its divisors is an integer number (1454220).

Almost surely, 2^13420666 is an apocalyptic number.

13420666 is a deficient number, since it is larger than the sum of its proper divisors (9846854).

13420666 is a wasteful number, since it uses less digits than its factorization.

13420666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10869.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 13420666 is about 3663.4227165316. The cubic root of 13420666 is about 237.6428156733.

The spelling of 13420666 in words is "thirteen million, four hundred twenty thousand, six hundred sixty-six".