664160543242 has 48 divisors (see below), whose sum is σ = 1190625950592. Its totient is φ = 272156351040.

The previous prime is 664160543239. The next prime is 664160543269. The reversal of 664160543242 is 242345061466.

It is a super-2 number, since 2×664160543242² (a number of 24 digits) contains 22 as substring.

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, 938892 + ... + 1486552.

It is an arithmetic number, because the mean of its divisors is an integer number (24804707304).

Almost surely, 2^664160543242 is an apocalyptic number.

664160543242 is a deficient number, since it is larger than the sum of its proper divisors (526465407350).

664160543242 is a wasteful number, since it uses less digits than its factorization.

664160543242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547831 (or 547802 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 43.

The spelling of 664160543242 in words is "six hundred sixty-four billion, one hundred sixty million, five hundred forty-three thousand, two hundred forty-two".