666775311 has 8 divisors (see below), whose sum is σ = 917712384. Its totient is φ = 430177560.

The previous prime is 666775297. The next prime is 666775321. The reversal of 666775311 is 113577666.

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

It is not a de Polignac number, because 666775311 - 2¹³ = 666767119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666775321) 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 7 ways as a sum of consecutive naturals, for example, 3584721 + ... + 3584906.

It is an arithmetic number, because the mean of its divisors is an integer number (114714048).

Almost surely, 2^666775311 is an apocalyptic number.

666775311 is a deficient number, since it is larger than the sum of its proper divisors (250937073).

666775311 is a wasteful number, since it uses less digits than its factorization.

666775311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7169661.

The product of its digits is 158760, while the sum is 42.

The square root of 666775311 is about 25821.9927774756. The cubic root of 666775311 is about 873.6279169423.

The spelling of 666775311 in words is "six hundred sixty-six million, seven hundred seventy-five thousand, three hundred eleven".