664188358145 has 16 divisors (see below), whose sum is σ = 858353099520. Its totient is φ = 490467628224.

The previous prime is 664188358129. The next prime is 664188358147. The reversal of 664188358145 is 541853881466.

It is a cyclic number.

It is not a de Polignac number, because 664188358145 - 2⁴ = 664188358129 is a prime.

It is a super-2 number, since 2×664188358145² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (664188358147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5238692 + ... + 5363978.

It is an arithmetic number, because the mean of its divisors is an integer number (53647068720).

Almost surely, 2^664188358145 is an apocalyptic number.

664188358145 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

664188358145 is a deficient number, since it is larger than the sum of its proper divisors (194164741375).

664188358145 is a wasteful number, since it uses less digits than its factorization.

664188358145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206864.

The product of its digits is 22118400, while the sum is 59.

The spelling of 664188358145 in words is "six hundred sixty-four billion, one hundred eighty-eight million, three hundred fifty-eight thousand, one hundred forty-five".