13772661 has 16 divisors (see below), whose sum is σ = 21225600. Its totient is φ = 7780608.

The previous prime is 13772639. The next prime is 13772677. The reversal of 13772661 is 16627731.

It is not a de Polignac number, because 13772661 - 2¹³ = 13764469 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13772611) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1816 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (1326600).

Almost surely, 2^13772661 is an apocalyptic number.

It is an amenable number.

13772661 is a deficient number, since it is larger than the sum of its proper divisors (7452939).

13772661 is an equidigital number, since it uses as much as digits as its factorization.

13772661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7468.

The product of its digits is 10584, while the sum is 33.

The square root of 13772661 is about 3711.1535942345. The cubic root of 13772661 is about 239.7025307581.

The spelling of 13772661 in words is "thirteen million, seven hundred seventy-two thousand, six hundred sixty-one".