66472375444 has 36 divisors (see below), whose sum is σ = 129993239124. Its totient is φ = 29634732288.

The previous prime is 66472375397. The next prime is 66472375451. The reversal of 66472375444 is 44457327466.

It can be written as a sum of positive squares in 2 ways, for example, as 29632179600 + 36840195844 = 172140^2 + 191938^2 .

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 66472375391 and 66472375400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1329379 + ... + 1378474.

It is an arithmetic number, because the mean of its divisors is an integer number (3610923309).

Almost surely, 2^66472375444 is an apocalyptic number.

It is an amenable number.

66472375444 is a deficient number, since it is larger than the sum of its proper divisors (63520863680).

66472375444 is a wasteful number, since it uses less digits than its factorization.

66472375444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707912 (or 2707891 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 52.

The spelling of 66472375444 in words is "sixty-six billion, four hundred seventy-two million, three hundred seventy-five thousand, four hundred forty-four".