66570361427 has 4 divisors (see below), whose sum is σ = 70074064680. Its totient is φ = 63066658176.

The previous prime is 66570361369. The next prime is 66570361453. The reversal of 66570361427 is 72416307566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66570361427 - 2¹⁴ = 66570345043 is a prime.

It is a super-2 number, since 2×66570361427² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66570361027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1751851598 + ... + 1751851635.

It is an arithmetic number, because the mean of its divisors is an integer number (17518516170).

Almost surely, 2^66570361427 is an apocalyptic number.

66570361427 is a deficient number, since it is larger than the sum of its proper divisors (3503703253).

66570361427 is a wasteful number, since it uses less digits than its factorization.

66570361427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503703252.

The product of its (nonzero) digits is 1270080, while the sum is 47.

The spelling of 66570361427 in words is "sixty-six billion, five hundred seventy million, three hundred sixty-one thousand, four hundred twenty-seven".