672721036 has 12 divisors (see below), whose sum is σ = 1267820512. Its totient is φ = 310486608.

The previous prime is 672721031. The next prime is 672721067. The reversal of 672721036 is 630127276.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 672720992 and 672721010.

It is not an unprimeable number, because it can be changed into a prime (672721031) 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 in 3 ways as a sum of consecutive naturals, for example, 6468420 + ... + 6468523.

Almost surely, 2^672721036 is an apocalyptic number.

It is an amenable number.

672721036 is a deficient number, since it is larger than the sum of its proper divisors (595099476).

672721036 is a wasteful number, since it uses less digits than its factorization.

672721036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12936960 (or 12936958 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 672721036 is about 25936.8663488865. The cubic root of 672721036 is about 876.2169889131.

The spelling of 672721036 in words is "six hundred seventy-two million, seven hundred twenty-one thousand, thirty-six".