260405866 has 16 divisors (see below), whose sum is σ = 449152704. Its totient is φ = 110916864.

The previous prime is 260405863. The next prime is 260405867. The reversal of 260405866 is 668504062.

It is a super-2 number, since 2×260405866² = 135622430094419912, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (260405863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54775 + ... + 59338.

It is an arithmetic number, because the mean of its divisors is an integer number (28072044).

Almost surely, 2^260405866 is an apocalyptic number.

260405866 is a deficient number, since it is larger than the sum of its proper divisors (188746838).

260405866 is a wasteful number, since it uses less digits than its factorization.

260405866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114285.

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 260405866 is about 16137.0959593106. The cubic root of 260405866 is about 638.5823651096.

The spelling of 260405866 in words is "two hundred sixty million, four hundred five thousand, eight hundred sixty-six".