660110381 has 8 divisors (see below), whose sum is σ = 754575360. Its totient is φ = 565686288.

The previous prime is 660110351. The next prime is 660110387. The reversal of 660110381 is 183011066.

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 660110381 - 2¹⁰ = 660109357 is a prime.

It is a super-2 number, since 2×660110381² = 871491430207930322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 660110381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660110387) 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, 42575 + ... + 55971.

It is an arithmetic number, because the mean of its divisors is an integer number (94321920).

Almost surely, 2^660110381 is an apocalyptic number.

It is an amenable number.

660110381 is a deficient number, since it is larger than the sum of its proper divisors (94464979).

660110381 is a wasteful number, since it uses less digits than its factorization.

660110381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20443.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 660110381 is about 25692.6133548146. The cubic root of 660110381 is about 870.7073038792.

The spelling of 660110381 in words is "six hundred sixty million, one hundred ten thousand, three hundred eighty-one".