664961169466 has 16 divisors (see below), whose sum is σ = 1089463322880. Its totient is φ = 301881453280.

The previous prime is 664961169421. The next prime is 664961169479.

664961169466 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 664961169398 and 664961169407.

It is an unprimeable number.

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, 18662986 + ... + 18698581.

It is an arithmetic number, because the mean of its divisors is an integer number (68091457680).

Almost surely, 2^664961169466 is an apocalyptic number.

664961169466 is a deficient number, since it is larger than the sum of its proper divisors (424502153414).

664961169466 is a wasteful number, since it uses less digits than its factorization.

664961169466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37362389.

The product of its digits is 60466176, while the sum is 64.

The spelling of 664961169466 in words is "six hundred sixty-four billion, nine hundred sixty-one million, one hundred sixty-nine thousand, four hundred sixty-six".