664838484475 has 24 divisors (see below), whose sum is σ = 928356295680. Its totient is φ = 467921508000.

The previous prime is 664838484473. The next prime is 664838484481. The reversal of 664838484475 is 574484838466.

It is not a de Polignac number, because 664838484475 - 2¹ = 664838484473 is a prime.

It is a hoax number, since the sum of its digits (67) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 664838484475.

It is not an unprimeable number, because it can be changed into a prime (664838484473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38984935 + ... + 39001984.

It is an arithmetic number, because the mean of its divisors is an integer number (38681512320).

Almost surely, 2^664838484475 is an apocalyptic number.

664838484475 is a deficient number, since it is larger than the sum of its proper divisors (263517811205).

664838484475 is a wasteful number, since it uses less digits than its factorization.

664838484475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77986971 (or 77986966 counting only the distinct ones).

The product of its digits is 495452160, while the sum is 67.

The spelling of 664838484475 in words is "six hundred sixty-four billion, eight hundred thirty-eight million, four hundred eighty-four thousand, four hundred seventy-five".