63161661 has 4 divisors (see below), whose sum is σ = 84215552. Its totient is φ = 42107772.

The previous prime is 63161653. The next prime is 63161669. The reversal of 63161661 is 16616136.

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 an interprime number because it is at equal distance from previous prime (63161653) and next prime (63161669).

It is not a de Polignac number, because 63161661 - 2³ = 63161653 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 (63161669) 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, 10526941 + ... + 10526946.

It is an arithmetic number, because the mean of its divisors is an integer number (21053888).

Almost surely, 2^63161661 is an apocalyptic number.

It is an amenable number.

63161661 is a deficient number, since it is larger than the sum of its proper divisors (21053891).

63161661 is a wasteful number, since it uses less digits than its factorization.

63161661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21053890.

The product of its digits is 3888, while the sum is 30.

The square root of 63161661 is about 7947.4310943852. The cubic root of 63161661 is about 398.2457784297.

Adding to 63161661 its reverse (16616136), we get a palindrome (79777797).

The spelling of 63161661 in words is "sixty-three million, one hundred sixty-one thousand, six hundred sixty-one".