671679763 has 4 divisors (see below), whose sum is σ = 672143488. Its totient is φ = 671216040.

The previous prime is 671679761. The next prime is 671679781. The reversal of 671679763 is 367976176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671679763 - 2¹ = 671679761 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671679763.

It is not an unprimeable number, because it can be changed into a prime (671679761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229683 + ... + 232588.

It is an arithmetic number, because the mean of its divisors is an integer number (168035872).

Almost surely, 2^671679763 is an apocalyptic number.

671679763 is a deficient number, since it is larger than the sum of its proper divisors (463725).

671679763 is a wasteful number, since it uses less digits than its factorization.

671679763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463724.

The product of its digits is 2000376, while the sum is 52.

The square root of 671679763 is about 25916.7853523542. The cubic root of 671679763 is about 875.7646705459.

The spelling of 671679763 in words is "six hundred seventy-one million, six hundred seventy-nine thousand, seven hundred sixty-three".