63013661 has 4 divisors (see below), whose sum is σ = 64202652. Its totient is φ = 61824672.

The previous prime is 63013651. The next prime is 63013667. The reversal of 63013661 is 16631036.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34987225 + 28026436 = 5915^2 + 5294^2 .

It is a cyclic number.

It is not a de Polignac number, because 63013661 - 2¹⁰ = 63012637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63013661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63013667) 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, 594416 + ... + 594521.

It is an arithmetic number, because the mean of its divisors is an integer number (16050663).

Almost surely, 2^63013661 is an apocalyptic number.

It is an amenable number.

63013661 is a deficient number, since it is larger than the sum of its proper divisors (1188991).

63013661 is a wasteful number, since it uses less digits than its factorization.

63013661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188990.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 63013661 is about 7938.1144486584. The cubic root of 63013661 is about 397.9344795050.

Adding to 63013661 its reverse (16631036), we get a palindrome (79644697).

The spelling of 63013661 in words is "sixty-three million, thirteen thousand, six hundred sixty-one".