665231043272 has 32 divisors (see below), whose sum is σ = 1287600314880. Its totient is φ = 321871898880.

The previous prime is 665231043119. The next prime is 665231043283. The reversal of 665231043272 is 272340132566.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7660448 + ... + 7746800.

It is an arithmetic number, because the mean of its divisors is an integer number (40237509840).

Almost surely, 2^665231043272 is an apocalyptic number.

665231043272 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

665231043272 is a deficient number, since it is larger than the sum of its proper divisors (622369271608).

665231043272 is a wasteful number, since it uses less digits than its factorization.

665231043272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117453 (or 117449 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 665231043272 in words is "six hundred sixty-five billion, two hundred thirty-one million, forty-three thousand, two hundred seventy-two".