635240066 has 4 divisors (see below), whose sum is σ = 952860102. Its totient is φ = 317620032.

The previous prime is 635240063. The next prime is 635240069. The reversal of 635240066 is 660042536.

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

It is an interprime number because it is at equal distance from previous prime (635240063) and next prime (635240069).

It can be written as a sum of positive squares in only one way, i.e., 496353841 + 138886225 = 22279^2 + 11785^2 .

It is not an unprimeable number, because it can be changed into a prime (635240063) by changing a digit.

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 as a sum of consecutive naturals, namely, 158810015 + ... + 158810018.

Almost surely, 2^635240066 is an apocalyptic number.

635240066 is a deficient number, since it is larger than the sum of its proper divisors (317620036).

635240066 is a wasteful number, since it uses less digits than its factorization.

635240066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317620035.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 635240066 is about 25203.9692508938. The cubic root of 635240066 is about 859.6321060290.

The spelling of 635240066 in words is "six hundred thirty-five million, two hundred forty thousand, sixty-six".