63669071 has 4 divisors (see below), whose sum is σ = 65722944. Its totient is φ = 61615200.

The previous prime is 63669061. The next prime is 63669077. The reversal of 63669071 is 17096636.

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 63669071 - 2¹⁰ = 63668047 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 (63669077) 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, 1026890 + ... + 1026951.

It is an arithmetic number, because the mean of its divisors is an integer number (16430736).

Almost surely, 2^63669071 is an apocalyptic number.

63669071 is a deficient number, since it is larger than the sum of its proper divisors (2053873).

63669071 is a wasteful number, since it uses less digits than its factorization.

63669071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053872.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 63669071 is about 7979.2901313337. The cubic root of 63669071 is about 399.3093728550.

The spelling of 63669071 in words is "sixty-three million, six hundred sixty-nine thousand, seventy-one".