664301242 has 16 divisors (see below), whose sum is σ = 1087754112. Its totient is φ = 301756320.

The previous prime is 664301221. The next prime is 664301269. The reversal of 664301242 is 242103466.

It is a super-2 number, since 2×664301242² = 882592280245485128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 664301242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27343 + ... + 45565.

It is an arithmetic number, because the mean of its divisors is an integer number (67984632).

Almost surely, 2^664301242 is an apocalyptic number.

664301242 is a deficient number, since it is larger than the sum of its proper divisors (423452870).

664301242 is a wasteful number, since it uses less digits than its factorization.

664301242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19893.

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 664301242 is about 25774.0420190548. The cubic root of 664301242 is about 872.5460459603.

The spelling of 664301242 in words is "six hundred sixty-four million, three hundred one thousand, two hundred forty-two".