72660044 has 6 divisors (see below), whose sum is σ = 127155084. Its totient is φ = 36330020.

The previous prime is 72660043. The next prime is 72660113. The reversal of 72660044 is 44006627.

It is a junction number, because it is equal to n+sod(n) for n = 72659989 and 72660016.

It is not an unprimeable number, because it can be changed into a prime (72660043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9082502 + ... + 9082509.

It is an arithmetic number, because the mean of its divisors is an integer number (21192514).

Almost surely, 2^72660044 is an apocalyptic number.

It is an amenable number.

72660044 is a deficient number, since it is larger than the sum of its proper divisors (54495040).

72660044 is a wasteful number, since it uses less digits than its factorization.

72660044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18165015 (or 18165013 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 72660044 is about 8524.0861093727. The cubic root of 72660044 is about 417.2841467298.

The spelling of 72660044 in words is "seventy-two million, six hundred sixty thousand, forty-four".