665127873436 has 24 divisors (see below), whose sum is σ = 1270681603184. Its totient is φ = 302776859520.

The previous prime is 665127873367. The next prime is 665127873437. The reversal of 665127873436 is 634378721566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665127873437) 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, 87605250 + ... + 87612841.

Almost surely, 2^665127873436 is an apocalyptic number.

It is an amenable number.

665127873436 is a deficient number, since it is larger than the sum of its proper divisors (605553729748).

665127873436 is a wasteful number, since it uses less digits than its factorization.

665127873436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175218181 (or 175218179 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 58.

The spelling of 665127873436 in words is "six hundred sixty-five billion, one hundred twenty-seven million, eight hundred seventy-three thousand, four hundred thirty-six".