666463 has 8 divisors (see below), whose sum is σ = 801920. Its totient is φ = 541080.

The previous prime is 666461. The next prime is 666467. The reversal of 666463 is 364666.

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 666463 - 2¹ = 666461 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666461) 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, 2373 + ... + 2638.

It is an arithmetic number, because the mean of its divisors is an integer number (100240).

2⁶⁶⁶⁴⁶³ is an apocalyptic number.

666463 is a deficient number, since it is larger than the sum of its proper divisors (135457).

666463 is a wasteful number, since it uses less digits than its factorization.

666463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5037.

The product of its digits is 15552, while the sum is 31.

The square root of 666463 is about 816.3718515481. The cubic root of 666463 is about 87.3491496065.

The spelling of 666463 in words is "six hundred sixty-six thousand, four hundred sixty-three".