664622550345 has 64 divisors (see below), whose sum is σ = 1177049664000. Its totient is φ = 318218250240.

The previous prime is 664622550343. The next prime is 664622550353. The reversal of 664622550345 is 543055226466.

It is not a de Polignac number, because 664622550345 - 2¹ = 664622550343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 664622550294 and 664622550303.

It is not an unprimeable number, because it can be changed into a prime (664622550341) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 744756 + ... + 1372554.

It is an arithmetic number, because the mean of its divisors is an integer number (18391401000).

Almost surely, 2^664622550345 is an apocalyptic number.

664622550345 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

664622550345 is a deficient number, since it is larger than the sum of its proper divisors (512427113655).

664622550345 is a wasteful number, since it uses less digits than its factorization.

664622550345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627970.

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 664622550345 in words is "six hundred sixty-four billion, six hundred twenty-two million, five hundred fifty thousand, three hundred forty-five".