664635655147 has 4 divisors (see below), whose sum is σ = 664638814576. Its totient is φ = 664632495720.

The previous prime is 664635655129. The next prime is 664635655157. The reversal of 664635655147 is 741556536466.

It is a happy number.

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 664635655147 - 2³⁵ = 630275916779 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 664635655091 and 664635655100.

It is not an unprimeable number, because it can be changed into a prime (664635655157) 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, 1239783 + ... + 1693024.

It is an arithmetic number, because the mean of its divisors is an integer number (166159703644).

Almost surely, 2^664635655147 is an apocalyptic number.

664635655147 is a deficient number, since it is larger than the sum of its proper divisors (3159429).

664635655147 is a wasteful number, since it uses less digits than its factorization.

664635655147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159428.

The product of its digits is 54432000, while the sum is 58.

The spelling of 664635655147 in words is "six hundred sixty-four billion, six hundred thirty-five million, six hundred fifty-five thousand, one hundred forty-seven".