63506671 has 4 divisors (see below), whose sum is σ = 63826000. Its totient is φ = 63187344.

The previous prime is 63506669. The next prime is 63506699. The reversal of 63506671 is 17660536.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 63506671 - 2¹ = 63506669 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 (63596671) 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, 159366 + ... + 159763.

It is an arithmetic number, because the mean of its divisors is an integer number (15956500).

Almost surely, 2^63506671 is an apocalyptic number.

63506671 is a deficient number, since it is larger than the sum of its proper divisors (319329).

63506671 is a wasteful number, since it uses less digits than its factorization.

63506671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319328.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 63506671 is about 7969.1072900294. The cubic root of 63506671 is about 398.9695791113.

The spelling of 63506671 in words is "sixty-three million, five hundred six thousand, six hundred seventy-one".