666264206424123 has 24 divisors (see below), whose sum is σ = 1014240725971200. Its totient is φ = 420296898460464.

The previous prime is 666264206424101. The next prime is 666264206424133. The reversal of 666264206424123 is 321424602462666.

It is not a de Polignac number, because 666264206424123 - 2³⁷ = 666126767470651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 666264206424123.

It is not an unprimeable number, because it can be changed into a prime (666264206424133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2321836215 + ... + 2322123152.

It is an arithmetic number, because the mean of its divisors is an integer number (42260030248800).

Almost surely, 2^{666264206424123} is an apocalyptic number.

666264206424123 is a deficient number, since it is larger than the sum of its proper divisors (347976519547077).

666264206424123 is a wasteful number, since it uses less digits than its factorization.

666264206424123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4643960231 (or 4643960228 counting only the distinct ones).

The product of its (nonzero) digits is 23887872, while the sum is 54.

Adding to 666264206424123 its reverse (321424602462666), we get a palindrome (987688808886789).

The spelling of 666264206424123 in words is "six hundred sixty-six trillion, two hundred sixty-four billion, two hundred six million, four hundred twenty-four thousand, one hundred twenty-three".