13772666 has 16 divisors (see below), whose sum is σ = 21033000. Its totient is φ = 6763008.

The previous prime is 13772639. The next prime is 13772677. The reversal of 13772666 is 66627731.

It can be written as a sum of positive squares in 4 ways, for example, as 8151025 + 5621641 = 2855^2 + 2371^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33470 + ... + 33878.

Almost surely, 2^13772666 is an apocalyptic number.

13772666 is a deficient number, since it is larger than the sum of its proper divisors (7260334).

13772666 is a wasteful number, since it uses less digits than its factorization.

13772666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673.

The product of its digits is 63504, while the sum is 38.

The square root of 13772666 is about 3711.1542678795. The cubic root of 13772666 is about 239.7025597651.

The spelling of 13772666 in words is "thirteen million, seven hundred seventy-two thousand, six hundred sixty-six".