111660513 has 4 divisors (see below), whose sum is σ = 148880688. Its totient is φ = 74440340.

The previous prime is 111660443. The next prime is 111660541. The reversal of 111660513 is 315066111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 111660513 - 2¹⁷ = 111529441 is a prime.

It is a super-3 number, since 3×111660513³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (111660013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18610083 + ... + 18610088.

It is an arithmetic number, because the mean of its divisors is an integer number (37220172).

Almost surely, 2^111660513 is an apocalyptic number.

It is an amenable number.

111660513 is a deficient number, since it is larger than the sum of its proper divisors (37220175).

111660513 is an equidigital number, since it uses as much as digits as its factorization.

111660513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37220174.

The product of its (nonzero) digits is 540, while the sum is 24.

The square root of 111660513 is about 10566.9538183906. The cubic root of 111660513 is about 481.5409289867.

The spelling of 111660513 in words is "one hundred eleven million, six hundred sixty thousand, five hundred thirteen".