11727661 has 8 divisors (see below), whose sum is σ = 12836448. Its totient is φ = 10626000.

The previous prime is 11727647. The next prime is 11727679. The reversal of 11727661 is 16672711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11727661 - 2¹¹ = 11725613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11727061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2031 + ... + 5251.

It is an arithmetic number, because the mean of its divisors is an integer number (1604556).

Almost surely, 2^11727661 is an apocalyptic number.

11727661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11727661 is a deficient number, since it is larger than the sum of its proper divisors (1108787).

11727661 is a wasteful number, since it uses less digits than its factorization.

11727661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563.

The product of its digits is 3528, while the sum is 31.

The square root of 11727661 is about 3424.5672719338. The cubic root of 11727661 is about 227.1976323585.

The spelling of 11727661 in words is "eleven million, seven hundred twenty-seven thousand, six hundred sixty-one".