11870661 has 16 divisors (see below), whose sum is σ = 17552448. Its totient is φ = 7075200.

The previous prime is 11870633. The next prime is 11870671. The reversal of 11870661 is 16607811.

It is a happy number.

It is not a de Polignac number, because 11870661 - 2⁶ = 11870597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11870671) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 936 + ... + 4961.

It is an arithmetic number, because the mean of its divisors is an integer number (1097028).

Almost surely, 2^11870661 is an apocalyptic number.

11870661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11870661 is a deficient number, since it is larger than the sum of its proper divisors (5681787).

11870661 is a wasteful number, since it uses less digits than its factorization.

11870661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5972.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 11870661 is about 3445.3825622128. The cubic root of 11870661 is about 228.1173411077.

The spelling of 11870661 in words is "eleven million, eight hundred seventy thousand, six hundred sixty-one".