66622466225 has 24 divisors (see below), whose sum is σ = 94747239360. Its totient is φ = 45522515520.

The previous prime is 66622466201. The next prime is 66622466231. The reversal of 66622466225 is 52266422666.

It is not a de Polignac number, because 66622466225 - 2⁶ = 66622466161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66622466225.

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, 623090 + ... + 722139.

It is an arithmetic number, because the mean of its divisors is an integer number (3947801640).

Almost surely, 2^66622466225 is an apocalyptic number.

It is an amenable number.

66622466225 is a deficient number, since it is larger than the sum of its proper divisors (28124773135).

66622466225 is a wasteful number, since it uses less digits than its factorization.

66622466225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1345529 (or 1345524 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 47.

The spelling of 66622466225 in words is "sixty-six billion, six hundred twenty-two million, four hundred sixty-six thousand, two hundred twenty-five".