13949666 has 16 divisors (see below), whose sum is σ = 21669120. Its totient is φ = 6729840.

The previous prime is 13949657. The next prime is 13949671. The reversal of 13949666 is 66694931.

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, 8975 + ... + 10413.

It is an arithmetic number, because the mean of its divisors is an integer number (1354320).

Almost surely, 2^13949666 is an apocalyptic number.

13949666 is a deficient number, since it is larger than the sum of its proper divisors (7719454).

13949666 is a wasteful number, since it uses less digits than its factorization.

13949666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1609.

The product of its digits is 209952, while the sum is 44.

The square root of 13949666 is about 3734.9251665863. The cubic root of 13949666 is about 240.7250412373.

The spelling of 13949666 in words is "thirteen million, nine hundred forty-nine thousand, six hundred sixty-six".