660841311 has 8 divisors (see below), whose sum is σ = 948900400. Its totient is φ = 406671552.

The previous prime is 660841303. The next prime is 660841327. The reversal of 660841311 is 113148066.

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

It is not a de Polignac number, because 660841311 - 2³ = 660841303 is a prime.

It is a super-2 number, since 2×660841311² = 873422476648397442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660841331) 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, 8472286 + ... + 8472363.

It is an arithmetic number, because the mean of its divisors is an integer number (118612550).

Almost surely, 2^660841311 is an apocalyptic number.

660841311 is a deficient number, since it is larger than the sum of its proper divisors (288059089).

660841311 is a wasteful number, since it uses less digits than its factorization.

660841311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16944665.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 660841311 is about 25706.8339357456. The cubic root of 660841311 is about 871.0285589050.

Adding to 660841311 its reverse (113148066), we get a palindrome (773989377).

The spelling of 660841311 in words is "six hundred sixty million, eight hundred forty-one thousand, three hundred eleven".