13702666 has 4 divisors (see below), whose sum is σ = 20554002. Its totient is φ = 6851332.

The previous prime is 13702649. The next prime is 13702669. The reversal of 13702666 is 66620731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66620731 = 149 ⋅447119.

It can be written as a sum of positive squares in only one way, i.e., 12752041 + 950625 = 3571^2 + 975^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13702669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3425665 + ... + 3425668.

Almost surely, 2^13702666 is an apocalyptic number.

13702666 is a deficient number, since it is larger than the sum of its proper divisors (6851336).

13702666 is an equidigital number, since it uses as much as digits as its factorization.

13702666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6851335.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 13702666 is about 3701.7112259062. The cubic root of 13702666 is about 239.2957712605.

The spelling of 13702666 in words is "thirteen million, seven hundred two thousand, six hundred sixty-six".