648166017 has 4 divisors (see below), whose sum is σ = 864221360. Its totient is φ = 432110676.

The previous prime is 648166003. The next prime is 648166027. The reversal of 648166017 is 710661846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 648166017 - 2¹⁸ = 647903873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (648166027) 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, 108027667 + ... + 108027672.

It is an arithmetic number, because the mean of its divisors is an integer number (216055340).

Almost surely, 2^648166017 is an apocalyptic number.

It is an amenable number.

648166017 is a deficient number, since it is larger than the sum of its proper divisors (216055343).

648166017 is a wasteful number, since it uses less digits than its factorization.

648166017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216055342.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 648166017 is about 25459.1047957307. The cubic root of 648166017 is about 865.4236364752.

The spelling of 648166017 in words is "six hundred forty-eight million, one hundred sixty-six thousand, seventeen".