66872672 has 24 divisors (see below), whose sum is σ = 133463736. Its totient is φ = 32977152.

The previous prime is 66872671. The next prime is 66872677. The reversal of 66872672 is 27627866.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66872671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11978 + ... + 16649.

It is an arithmetic number, because the mean of its divisors is an integer number (5560989).

Almost surely, 2^66872672 is an apocalyptic number.

It is an amenable number.

66872672 is a deficient number, since it is larger than the sum of its proper divisors (66591064).

66872672 is a wasteful number, since it uses less digits than its factorization.

66872672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28710 (or 28702 counting only the distinct ones).

The product of its digits is 338688, while the sum is 44.

The square root of 66872672 is about 8177.5712775860. The cubic root of 66872672 is about 405.8973589289.

The spelling of 66872672 in words is "sixty-six million, eight hundred seventy-two thousand, six hundred seventy-two".