260661810 has 32 divisors (see below), whose sum is σ = 631789632. Its totient is φ = 68820800.

The previous prime is 260661767. The next prime is 260661811. The reversal of 260661810 is 18166062.

It is a super-2 number, since 2×260661810² = 135889158384952200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (260661811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39984 + ... + 46043.

It is an arithmetic number, because the mean of its divisors is an integer number (19743426).

Almost surely, 2^260661810 is an apocalyptic number.

260661810 is an abundant number, since it is smaller than the sum of its proper divisors (371127822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

260661810 is a wasteful number, since it uses less digits than its factorization.

260661810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86138.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 260661810 is about 16145.0243109139. The cubic root of 260661810 is about 638.7915101770.

The spelling of 260661810 in words is "two hundred sixty million, six hundred sixty-one thousand, eight hundred ten".