1661322363 has 8 divisors (see below), whose sum is σ = 2243136000. Its totient is φ = 1093528488.

The previous prime is 1661322359. The next prime is 1661322379. The reversal of 1661322363 is 3632231661.

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

It is not a de Polignac number, because 1661322363 - 2² = 1661322359 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1661322353) 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, 3504663 + ... + 3505136.

It is an arithmetic number, because the mean of its divisors is an integer number (280392000).

Almost surely, 2^1661322363 is an apocalyptic number.

1661322363 is a deficient number, since it is larger than the sum of its proper divisors (581813637).

1661322363 is an equidigital number, since it uses as much as digits as its factorization.

1661322363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7009881.

The product of its digits is 23328, while the sum is 33.

The square root of 1661322363 is about 40759.3224060460. The cubic root of 1661322363 is about 1184.3624700099.

The spelling of 1661322363 in words is "one billion, six hundred sixty-one million, three hundred twenty-two thousand, three hundred sixty-three".