259320641666 has 16 divisors (see below), whose sum is σ = 391451928000. Its totient is φ = 128837009808.

The previous prime is 259320641627. The next prime is 259320641683. The reversal of 259320641666 is 666146023952.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467860 + ... + 1635008.

It is an arithmetic number, because the mean of its divisors is an integer number (24465745500).

Almost surely, 2^259320641666 is an apocalyptic number.

259320641666 is a deficient number, since it is larger than the sum of its proper divisors (132131286334).

259320641666 is a wasteful number, since it uses less digits than its factorization.

259320641666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172073.

The product of its (nonzero) digits is 2799360, while the sum is 50.

The spelling of 259320641666 in words is "two hundred fifty-nine billion, three hundred twenty million, six hundred forty-one thousand, six hundred sixty-six".