664567765466 has 64 divisors (see below), whose sum is σ = 1224047687040. Its totient is φ = 266676480000.

The previous prime is 664567765451. The next prime is 664567765481.

664567765466 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (664567765451) and next prime (664567765481).

It is a junction number, because it is equal to n+sod(n) for n = 664567765396 and 664567765405.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254726 + ... + 1180686.

It is an arithmetic number, because the mean of its divisors is an integer number (19125745110).

Almost surely, 2^664567765466 is an apocalyptic number.

664567765466 is a deficient number, since it is larger than the sum of its proper divisors (559479921574).

664567765466 is a wasteful number, since it uses less digits than its factorization.

664567765466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 926111.

The product of its digits is 914457600, while the sum is 68.

The spelling of 664567765466 in words is "six hundred sixty-four billion, five hundred sixty-seven million, seven hundred sixty-five thousand, four hundred sixty-six".