664486242 has 32 divisors (see below), whose sum is σ = 1608170112. Its totient is φ = 178685184.

The previous prime is 664486241. The next prime is 664486331. The reversal of 664486242 is 242684466.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 664486194 and 664486203.

It is not an unprimeable number, because it can be changed into a prime (664486241) 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, 464613 + ... + 466040.

It is an arithmetic number, because the mean of its divisors is an integer number (50255316).

Almost surely, 2^664486242 is an apocalyptic number.

664486242 is an abundant number, since it is smaller than the sum of its proper divisors (943683870).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

664486242 is a wasteful number, since it uses less digits than its factorization.

664486242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930682.

The product of its digits is 442368, while the sum is 42.

The square root of 664486242 is about 25777.6306514001. The cubic root of 664486242 is about 872.6270363434.

The spelling of 664486242 in words is "six hundred sixty-four million, four hundred eighty-six thousand, two hundred forty-two".