11661480 has 96 divisors (see below), whose sum is σ = 39241800. Its totient is φ = 2999808.

The previous prime is 11661467. The next prime is 11661491. The reversal of 11661480 is 8416611.

It can be written as a sum of positive squares in 4 ways, for example, as 6380676 + 5280804 = 2526^2 + 2298^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9882 + ... + 10998.

Almost surely, 2^11661480 is an apocalyptic number.

11661480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11661480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19620900).

11661480 is an abundant number, since it is smaller than the sum of its proper divisors (27580320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11661480 is a wasteful number, since it uses less digits than its factorization.

11661480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1163 (or 1156 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 11661480 is about 3414.8909206591. The cubic root of 11661480 is about 226.7694554948.

The spelling of 11661480 in words is "eleven million, six hundred sixty-one thousand, four hundred eighty".