667464242 has 4 divisors (see below), whose sum is σ = 1001196366. Its totient is φ = 333732120.

The previous prime is 667464241. The next prime is 667464253. The reversal of 667464242 is 242464766.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 564015001 + 103449241 = 23749^2 + 10171^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 667464242.

It is not an unprimeable number, because it can be changed into a prime (667464241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166866059 + ... + 166866062.

Almost surely, 2^667464242 is an apocalyptic number.

667464242 is a deficient number, since it is larger than the sum of its proper divisors (333732124).

667464242 is a wasteful number, since it uses less digits than its factorization.

667464242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333732123.

The product of its digits is 387072, while the sum is 41.

The square root of 667464242 is about 25835.3293379434. The cubic root of 667464242 is about 873.9286990168.

The spelling of 667464242 in words is "six hundred sixty-seven million, four hundred sixty-four thousand, two hundred forty-two".