664167046 has 4 divisors (see below), whose sum is σ = 996250572. Its totient is φ = 332083522.

The previous prime is 664167043. The next prime is 664167061. The reversal of 664167046 is 640761466.

It is a happy number.

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

It is a super-2 number, since 2×664167046² = 882235729984732232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664167043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166041760 + ... + 166041763.

It is an arithmetic number, because the mean of its divisors is an integer number (249062643).

Almost surely, 2^664167046 is an apocalyptic number.

664167046 is a deficient number, since it is larger than the sum of its proper divisors (332083526).

664167046 is a wasteful number, since it uses less digits than its factorization.

664167046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332083525.

The product of its (nonzero) digits is 145152, while the sum is 40.

The square root of 664167046 is about 25771.4385706347. The cubic root of 664167046 is about 872.4872874397.

The spelling of 664167046 in words is "six hundred sixty-four million, one hundred sixty-seven thousand, forty-six".