664414147 has 4 divisors (see below), whose sum is σ = 665546616. Its totient is φ = 663281680.

The previous prime is 664414117. The next prime is 664414151. The reversal of 664414147 is 741414466.

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

It is a cyclic number.

It is not a de Polignac number, because 664414147 - 2⁷ = 664414019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (664414117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 565354 + ... + 566527.

It is an arithmetic number, because the mean of its divisors is an integer number (166386654).

Almost surely, 2^664414147 is an apocalyptic number.

664414147 is a deficient number, since it is larger than the sum of its proper divisors (1132469).

664414147 is a wasteful number, since it uses less digits than its factorization.

664414147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132468.

The product of its digits is 64512, while the sum is 37.

The square root of 664414147 is about 25776.2322110893. The cubic root of 664414147 is about 872.5954759600.

The spelling of 664414147 in words is "six hundred sixty-four million, four hundred fourteen thousand, one hundred forty-seven".