261663322 has 8 divisors (see below), whose sum is σ = 392623200. Its totient is φ = 130788924.

The previous prime is 261663319. The next prime is 261663323. The reversal of 261663322 is 223366162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (261663323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13072 + ... + 26347.

It is an arithmetic number, because the mean of its divisors is an integer number (49077900).

Almost surely, 2^261663322 is an apocalyptic number.

261663322 is a deficient number, since it is larger than the sum of its proper divisors (130959878).

261663322 is a wasteful number, since it uses less digits than its factorization.

261663322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42740.

The product of its digits is 15552, while the sum is 31.

The square root of 261663322 is about 16176.0106948530. The cubic root of 261663322 is about 639.6085839057.

The spelling of 261663322 in words is "two hundred sixty-one million, six hundred sixty-three thousand, three hundred twenty-two".