66708472 has 8 divisors (see below), whose sum is σ = 125078400. Its totient is φ = 33354232.

The previous prime is 66708457. The next prime is 66708479. The reversal of 66708472 is 27480766.

It is a tau number, because it is divible by the number of its divisors (8).

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66708479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4169272 + ... + 4169287.

It is an arithmetic number, because the mean of its divisors is an integer number (15634800).

Almost surely, 2^66708472 is an apocalyptic number.

It is an amenable number.

66708472 is a deficient number, since it is larger than the sum of its proper divisors (58369928).

66708472 is a wasteful number, since it uses less digits than its factorization.

66708472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8338565 (or 8338561 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 66708472 is about 8167.5254514449. The cubic root of 66708472 is about 405.5648714887.

The spelling of 66708472 in words is "sixty-six million, seven hundred eight thousand, four hundred seventy-two".