601646663 has 4 divisors (see below), whose sum is σ = 603544920. Its totient is φ = 599748408.

The previous prime is 601646651. The next prime is 601646681. The reversal of 601646663 is 366646106.

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 601646663 - 2¹⁴ = 601630279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (601646693) 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, 948653 + ... + 949286.

It is an arithmetic number, because the mean of its divisors is an integer number (150886230).

Almost surely, 2^601646663 is an apocalyptic number.

601646663 is a deficient number, since it is larger than the sum of its proper divisors (1898257).

601646663 is a wasteful number, since it uses less digits than its factorization.

601646663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1898256.

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 601646663 is about 24528.4867653918. The cubic root of 601646663 is about 844.2035435014.

The spelling of 601646663 in words is "six hundred one million, six hundred forty-six thousand, six hundred sixty-three".