66704472 has 48 divisors (see below), whose sum is σ = 187354440. Its totient is φ = 22234176.

The previous prime is 66704471. The next prime is 66704483. The reversal of 66704472 is 27440766.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 (66704471) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15213 + ... + 19100.

Almost surely, 2^66704472 is an apocalyptic number.

It is an amenable number.

66704472 is an abundant number, since it is smaller than the sum of its proper divisors (120649968).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66704472 is a wasteful number, since it uses less digits than its factorization.

66704472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34334 (or 34318 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 36.

The square root of 66704472 is about 8167.2805755649. The cubic root of 66704472 is about 405.5567651125.

It can be divided in two parts, 66704 and 472, that added together give a palindrome (67176).

The spelling of 66704472 in words is "sixty-six million, seven hundred four thousand, four hundred seventy-two".