663661127 has 8 divisors (see below), whose sum is σ = 700220160. Its totient is φ = 627265080.

The previous prime is 663661121. The next prime is 663661129. The reversal of 663661127 is 721166366.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 663661127 - 2¹⁴ = 663644743 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 (663661121) 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, 32333 + ... + 48710.

It is an arithmetic number, because the mean of its divisors is an integer number (87527520).

Almost surely, 2^663661127 is an apocalyptic number.

663661127 is a deficient number, since it is larger than the sum of its proper divisors (36559033).

663661127 is a wasteful number, since it uses less digits than its factorization.

663661127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81493.

The product of its digits is 54432, while the sum is 38.

The square root of 663661127 is about 25761.6212028669. The cubic root of 663661127 is about 872.2656965891.

The spelling of 663661127 in words is "six hundred sixty-three million, six hundred sixty-one thousand, one hundred twenty-seven".