11661437 has 8 divisors (see below), whose sum is σ = 12296256. Its totient is φ = 11037312.

The previous prime is 11661407. The next prime is 11661449. The reversal of 11661437 is 73416611.

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

It is a cyclic number.

It is not a de Polignac number, because 11661437 - 2¹⁰ = 11660413 is a prime.

It is a super-2 number, since 2×11661437² = 271978225809938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11661407) 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, 383 + ... + 4844.

It is an arithmetic number, because the mean of its divisors is an integer number (1537032).

Almost surely, 2^11661437 is an apocalyptic number.

It is an amenable number.

11661437 is a deficient number, since it is larger than the sum of its proper divisors (634819).

11661437 is an equidigital number, since it uses as much as digits as its factorization.

11661437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5347.

The product of its digits is 3024, while the sum is 29.

The square root of 11661437 is about 3414.8846246982. The cubic root of 11661437 is about 226.7691767681.

The spelling of 11661437 in words is "eleven million, six hundred sixty-one thousand, four hundred thirty-seven".