66572145453 has 64 divisors (see below), whose sum is σ = 101703942144. Its totient is φ = 38368320000.

The previous prime is 66572145407. The next prime is 66572145457. The reversal of 66572145453 is 35454127566.

It is not a de Polignac number, because 66572145453 - 2⁶ = 66572145389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66572145457) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 14152900 + ... + 14157602.

It is an arithmetic number, because the mean of its divisors is an integer number (1589124096).

Almost surely, 2^66572145453 is an apocalyptic number.

It is an amenable number.

66572145453 is a deficient number, since it is larger than the sum of its proper divisors (35131796691).

66572145453 is a wasteful number, since it uses less digits than its factorization.

66572145453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4986.

The product of its digits is 3024000, while the sum is 48.

The spelling of 66572145453 in words is "sixty-six billion, five hundred seventy-two million, one hundred forty-five thousand, four hundred fifty-three".