665147243476 has 24 divisors (see below), whose sum is σ = 1204321860000. Its totient is φ = 321058635744.

The previous prime is 665147243473. The next prime is 665147243503. The reversal of 665147243476 is 674342741566.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665147243473) 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, 384715 + ... + 1215853.

It is an arithmetic number, because the mean of its divisors is an integer number (50180077500).

Almost surely, 2^665147243476 is an apocalyptic number.

It is an amenable number.

665147243476 is a deficient number, since it is larger than the sum of its proper divisors (539174616524).

665147243476 is a wasteful number, since it uses less digits than its factorization.

665147243476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838071 (or 838069 counting only the distinct ones).

The product of its digits is 20321280, while the sum is 55.

The spelling of 665147243476 in words is "six hundred sixty-five billion, one hundred forty-seven million, two hundred forty-three thousand, four hundred seventy-six".