66570361425 has 18 divisors (see below), whose sum is σ = 119234914422. Its totient is φ = 35504192640.

The previous prime is 66570361369. The next prime is 66570361453. The reversal of 66570361425 is 52416307566.

66570361425 is a `hidden beast` number, since 6 + 6 + 5 + 7 + 0 + 3 + 614 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 233722944 + 66336638481 = 15288^2 + 257559^2 .

It is not a de Polignac number, because 66570361425 - 2¹⁹ = 66569837137 is a prime.

It is a super-2 number, since 2×66570361425² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 147933912 + ... + 147934361.

Almost surely, 2^66570361425 is an apocalyptic number.

It is an amenable number.

66570361425 is a deficient number, since it is larger than the sum of its proper divisors (52664552997).

66570361425 is a wasteful number, since it uses less digits than its factorization.

66570361425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295868289 (or 295868281 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 45.

The spelling of 66570361425 in words is "sixty-six billion, five hundred seventy million, three hundred sixty-one thousand, four hundred twenty-five".