51986663 has 8 divisors (see below), whose sum is σ = 55207008. Its totient is φ = 48784384.

The previous prime is 51986657. The next prime is 51986677. The reversal of 51986663 is 36668915.

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-51986663 is a prime.

It is a super-2 number, since 2×51986663² = 5405226259751138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51986063) 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, 1670 + ... + 10332.

It is an arithmetic number, because the mean of its divisors is an integer number (6900876).

Almost surely, 2^51986663 is an apocalyptic number.

51986663 is a deficient number, since it is larger than the sum of its proper divisors (3220345).

51986663 is a wasteful number, since it uses less digits than its factorization.

51986663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9033.

The product of its digits is 233280, while the sum is 44.

The square root of 51986663 is about 7210.1777370603. The cubic root of 51986663 is about 373.2192023754.

The spelling of 51986663 in words is "fifty-one million, nine hundred eighty-six thousand, six hundred sixty-three".