66625007227567 has 4 divisors (see below), whose sum is σ = 66625049844360. Its totient is φ = 66624964610776.

The previous prime is 66625007227511. The next prime is 66625007227589. The reversal of 66625007227567 is 76572270052666.

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 66625007227567 - 2¹¹ = 66625007225519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66625007227067) 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, 18870388 + ... + 22121065.

It is an arithmetic number, because the mean of its divisors is an integer number (16656262461090).

Almost surely, 2^{66625007227567} is an apocalyptic number.

66625007227567 is a deficient number, since it is larger than the sum of its proper divisors (42616793).

66625007227567 is a wasteful number, since it uses less digits than its factorization.

66625007227567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42616792.

The product of its (nonzero) digits is 88905600, while the sum is 61.

The spelling of 66625007227567 in words is "sixty-six trillion, six hundred twenty-five billion, seven million, two hundred twenty-seven thousand, five hundred sixty-seven".