11670581 has 8 divisors (see below), whose sum is σ = 12775224. Its totient is φ = 10595520.

The previous prime is 11670569. The next prime is 11670599. The reversal of 11670581 is 18507611.

It can be written as a sum of positive squares in 4 ways, for example, as 555025 + 11115556 = 745^2 + 3334^2 .

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

It is not a de Polignac number, because 11670581 - 2¹⁰ = 11669557 is a prime.

It is a super-2 number, since 2×11670581² = 272404921755122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11670511) 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, 6566 + ... + 8151.

It is an arithmetic number, because the mean of its divisors is an integer number (1596903).

Almost surely, 2^11670581 is an apocalyptic number.

It is an amenable number.

11670581 is a deficient number, since it is larger than the sum of its proper divisors (1104643).

11670581 is a wasteful number, since it uses less digits than its factorization.

11670581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14791.

The product of its (nonzero) digits is 1680, while the sum is 29.

The square root of 11670581 is about 3416.2232069934. The cubic root of 11670581 is about 226.8284329189.

The spelling of 11670581 in words is "eleven million, six hundred seventy thousand, five hundred eighty-one".