63423661 has 16 divisors (see below), whose sum is σ = 75513600. Its totient is φ = 52133760.

The previous prime is 63423637. The next prime is 63423697. The reversal of 63423661 is 16632436.

It is not a de Polignac number, because 63423661 - 2⁵ = 63423629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63423601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16665 + ... + 20113.

It is an arithmetic number, because the mean of its divisors is an integer number (4719600).

Almost surely, 2^63423661 is an apocalyptic number.

It is an amenable number.

63423661 is a deficient number, since it is larger than the sum of its proper divisors (12089939).

63423661 is a wasteful number, since it uses less digits than its factorization.

63423661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3564.

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

The square root of 63423661 is about 7963.8973499161. The cubic root of 63423661 is about 398.7956713705.

The spelling of 63423661 in words is "sixty-three million, four hundred twenty-three thousand, six hundred sixty-one".