66572613425 has 6 divisors (see below), whose sum is σ = 82550040678. Its totient is φ = 53258090720.

The previous prime is 66572613409. The next prime is 66572613427. The reversal of 66572613425 is 52431627566.

It can be written as a sum of positive squares in 3 ways, for example, as 206094736 + 66366518689 = 14356^2 + 257617^2 .

It is not a de Polignac number, because 66572613425 - 2⁴ = 66572613409 is a prime.

It is a super-3 number, since 3×66572613425³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66572613425.

It is not an unprimeable number, because it can be changed into a prime (66572613427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1331452244 + ... + 1331452293.

It is an arithmetic number, because the mean of its divisors is an integer number (13758340113).

Almost surely, 2^66572613425 is an apocalyptic number.

It is an amenable number.

66572613425 is a deficient number, since it is larger than the sum of its proper divisors (15977427253).

66572613425 is a wasteful number, since it uses less digits than its factorization.

66572613425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662904547 (or 2662904542 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 47.

The spelling of 66572613425 in words is "sixty-six billion, five hundred seventy-two million, six hundred thirteen thousand, four hundred twenty-five".