642466653 has 8 divisors (see below), whose sum is σ = 856740000. Its totient is φ = 428252208.

The previous prime is 642466651. The next prime is 642466673. The reversal of 642466653 is 356664246.

642466653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 642466653 - 2¹ = 642466651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642466651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31123 + ... + 47471.

It is an arithmetic number, because the mean of its divisors is an integer number (107092500).

Almost surely, 2^642466653 is an apocalyptic number.

It is an amenable number.

642466653 is a deficient number, since it is larger than the sum of its proper divisors (214273347).

642466653 is a wasteful number, since it uses less digits than its factorization.

642466653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29451.

The product of its digits is 622080, while the sum is 42.

The square root of 642466653 is about 25346.9259082832. The cubic root of 642466653 is about 862.8795906137.

The spelling of 642466653 in words is "six hundred forty-two million, four hundred sixty-six thousand, six hundred fifty-three".