66223422665425 has 24 divisors (see below), whose sum is σ = 82278971210592. Its totient is φ = 52874312832000.

The previous prime is 66223422665321. The next prime is 66223422665431. The reversal of 66223422665425 is 52456622432266.

It is not a de Polignac number, because 66223422665425 - 2¹⁵ = 66223422632657 is a prime.

It is a super-2 number, since 2×66223422665425² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60198570 + ... + 61288780.

It is an arithmetic number, because the mean of its divisors is an integer number (3428290467108).

Almost surely, 2^{66223422665425} is an apocalyptic number.

It is an amenable number.

66223422665425 is a deficient number, since it is larger than the sum of its proper divisors (16055548545167).

66223422665425 is a wasteful number, since it uses less digits than its factorization.

66223422665425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095009 (or 1095004 counting only the distinct ones).

The product of its digits is 49766400, while the sum is 55.

The spelling of 66223422665425 in words is "sixty-six trillion, two hundred twenty-three billion, four hundred twenty-two million, six hundred sixty-five thousand, four hundred twenty-five".