671223663 has 18 divisors (see below), whose sum is σ = 1065700272. Its totient is φ = 406801560.

The previous prime is 671223661. The next prime is 671223689. The reversal of 671223663 is 366322176.

It is not a de Polignac number, because 671223663 - 2¹ = 671223661 is a prime.

It is a super-2 number, since 2×671223663² = 901082411542275138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671223661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 307095 + ... + 309272.

Almost surely, 2^671223663 is an apocalyptic number.

671223663 is a deficient number, since it is larger than the sum of its proper divisors (394476609).

671223663 is a wasteful number, since it uses less digits than its factorization.

671223663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 616395 (or 616381 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 671223663 is about 25907.9845414498. The cubic root of 671223663 is about 875.5663981280.

The spelling of 671223663 in words is "six hundred seventy-one million, two hundred twenty-three thousand, six hundred sixty-three".