259256666 has 4 divisors (see below), whose sum is σ = 388885002. Its totient is φ = 129628332.

The previous prime is 259256659. The next prime is 259256671. The reversal of 259256666 is 666652952.

259256666 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 166539025 + 92717641 = 12905^2 + 9629^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 259256666.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64814165 + ... + 64814168.

Almost surely, 2^259256666 is an apocalyptic number.

259256666 is a deficient number, since it is larger than the sum of its proper divisors (129628336).

259256666 is a wasteful number, since it uses less digits than its factorization.

259256666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129628335.

The product of its digits is 1166400, while the sum is 47.

The square root of 259256666 is about 16101.4491894363. The cubic root of 259256666 is about 637.6416015581.

The spelling of 259256666 in words is "two hundred fifty-nine million, two hundred fifty-six thousand, six hundred sixty-six".