671813166748 has 6 divisors (see below), whose sum is σ = 1175673041816. Its totient is φ = 335906583372.

The previous prime is 671813166727. The next prime is 671813166749. The reversal of 671813166748 is 847661318176.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 671813166692 and 671813166701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671813166749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83976645840 + ... + 83976645847.

Almost surely, 2^671813166748 is an apocalyptic number.

It is an amenable number.

671813166748 is a deficient number, since it is larger than the sum of its proper divisors (503859875068).

671813166748 is a wasteful number, since it uses less digits than its factorization.

671813166748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167953291691 (or 167953291689 counting only the distinct ones).

The product of its digits is 8128512, while the sum is 58.

The spelling of 671813166748 in words is "six hundred seventy-one billion, eight hundred thirteen million, one hundred sixty-six thousand, seven hundred forty-eight".