666552264577 has 4 divisors (see below), whose sum is σ = 666566318016. Its totient is φ = 666538211140.

The previous prime is 666552264571. The next prime is 666552264583. The reversal of 666552264577 is 775462255666.

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 an interprime number because it is at equal distance from previous prime (666552264571) and next prime (666552264583).

It is a cyclic number.

It is not a de Polignac number, because 666552264577 - 2³ = 666552264569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (666552264571) 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 3 ways as a sum of consecutive naturals, for example, 6955333 + ... + 7050514.

It is an arithmetic number, because the mean of its divisors is an integer number (166641579504).

Almost surely, 2^666552264577 is an apocalyptic number.

It is an amenable number.

666552264577 is a deficient number, since it is larger than the sum of its proper divisors (14053439).

666552264577 is a wasteful number, since it uses less digits than its factorization.

666552264577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14053438.

The product of its digits is 127008000, while the sum is 61.

The spelling of 666552264577 in words is "six hundred sixty-six billion, five hundred fifty-two million, two hundred sixty-four thousand, five hundred seventy-seven".