13278466 has 4 divisors (see below), whose sum is σ = 19917702. Its totient is φ = 6639232.

The previous prime is 13278439. The next prime is 13278493. The reversal of 13278466 is 66487231.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (13278439) and next prime (13278493).

It can be written as a sum of positive squares in only one way, i.e., 12809241 + 469225 = 3579^2 + 685^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3319615 + ... + 3319618.

Almost surely, 2^13278466 is an apocalyptic number.

13278466 is a deficient number, since it is larger than the sum of its proper divisors (6639236).

13278466 is an equidigital number, since it uses as much as digits as its factorization.

13278466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6639235.

The product of its digits is 48384, while the sum is 37.

The square root of 13278466 is about 3643.9629526108. The cubic root of 13278466 is about 236.8005110357.

The spelling of 13278466 in words is "thirteen million, two hundred seventy-eight thousand, four hundred sixty-six".