63666037 has 8 divisors (see below), whose sum is σ = 67495896. Its totient is φ = 59845632.

The previous prime is 63666019. The next prime is 63666077. The reversal of 63666037 is 73066636.

It can be written as a sum of positive squares in 4 ways, for example, as 320356 + 63345681 = 566^2 + 7959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63666037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63665987 and 63666005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63666077) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15373 + ... + 19069.

It is an arithmetic number, because the mean of its divisors is an integer number (8436987).

Almost surely, 2^63666037 is an apocalyptic number.

It is an amenable number.

63666037 is a deficient number, since it is larger than the sum of its proper divisors (3829859).

63666037 is a wasteful number, since it uses less digits than its factorization.

63666037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4727.

The product of its (nonzero) digits is 81648, while the sum is 37.

The square root of 63666037 is about 7979.1000119061. The cubic root of 63666037 is about 399.3030300375.

It can be divided in two parts, 6366 and 6037, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 63666037 in words is "sixty-three million, six hundred sixty-six thousand, thirty-seven".