66070072 has 8 divisors (see below), whose sum is σ = 123881400. Its totient is φ = 33035032.

The previous prime is 66070061. The next prime is 66070079. The reversal of 66070072 is 27007066.

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

It is a self number, because there is not a number n which added to its sum of digits gives 66070072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66070079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4129372 + ... + 4129387.

It is an arithmetic number, because the mean of its divisors is an integer number (15485175).

Almost surely, 2^66070072 is an apocalyptic number.

It is an amenable number.

66070072 is a deficient number, since it is larger than the sum of its proper divisors (57811328).

66070072 is a wasteful number, since it uses less digits than its factorization.

66070072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258765 (or 8258761 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 66070072 is about 8128.3498940437. The cubic root of 66070072 is about 404.2669705539.

The spelling of 66070072 in words is "sixty-six million, seventy thousand, seventy-two".