63441661 has 4 divisors (see below), whose sum is σ = 64244800. Its totient is φ = 62638524.

The previous prime is 63441629. The next prime is 63441673. The reversal of 63441661 is 16614436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63441661 - 2⁵ = 63441629 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 (63441761) 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, 401451 + ... + 401608.

It is an arithmetic number, because the mean of its divisors is an integer number (16061200).

Almost surely, 2^63441661 is an apocalyptic number.

It is an amenable number.

63441661 is a deficient number, since it is larger than the sum of its proper divisors (803139).

63441661 is an equidigital number, since it uses as much as digits as its factorization.

63441661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803138.

The product of its digits is 10368, while the sum is 31.

The square root of 63441661 is about 7965.0273696956. The cubic root of 63441661 is about 398.8333946376.

The spelling of 63441661 in words is "sixty-three million, four hundred forty-one thousand, six hundred sixty-one".