666103311 has 32 divisors (see below), whose sum is σ = 1058400000. Its totient is φ = 412742304.

The previous prime is 666103307. The next prime is 666103313. The reversal of 666103311 is 113301666.

It is a happy number.

It is not a de Polignac number, because 666103311 - 2² = 666103307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666103313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14940 + ... + 39438.

It is an arithmetic number, because the mean of its divisors is an integer number (33075000).

Almost surely, 2^666103311 is an apocalyptic number.

666103311 is a deficient number, since it is larger than the sum of its proper divisors (392296689).

666103311 is a wasteful number, since it uses less digits than its factorization.

666103311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24580 (or 24574 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 666103311 is about 25808.9773334784. The cubic root of 666103311 is about 873.3343271392.

Adding to 666103311 its reverse (113301666), we get a palindrome (779404977).

The spelling of 666103311 in words is "six hundred sixty-six million, one hundred three thousand, three hundred eleven".