366866404668663 has 4 divisors (see below), whose sum is σ = 489155206224888. Its totient is φ = 244577603112440.

The previous prime is 366866404668661. The next prime is 366866404668677.

366866404668663 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 366866404668663 - 2¹ = 366866404668661 is a prime.

It is a super-2 number, since 2×366866404668663² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (366866404668661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61144400778108 + ... + 61144400778113.

It is an arithmetic number, because the mean of its divisors is an integer number (122288801556222).

Almost surely, 2^{366866404668663} is an apocalyptic number.

366866404668663 is a deficient number, since it is larger than the sum of its proper divisors (122288801556225).

366866404668663 is a wasteful number, since it uses less digits than its factorization.

366866404668663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122288801556224.

The product of its (nonzero) digits is 15479341056, while the sum is 78.

The spelling of 366866404668663 in words is "three hundred sixty-six trillion, eight hundred sixty-six billion, four hundred four million, six hundred sixty-eight thousand, six hundred sixty-three".