661466676301 has 4 divisors (see below), whose sum is σ = 661892606172. Its totient is φ = 661040746432.

The previous prime is 661466676293. The next prime is 661466676319. The reversal of 661466676301 is 103676664166.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37548363076 + 623918313225 = 193774^2 + 789885^2 .

It is a cyclic number.

It is not a de Polignac number, because 661466676301 - 2³ = 661466676293 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 (661466676361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212962606 + ... + 212965711.

It is an arithmetic number, because the mean of its divisors is an integer number (165473151543).

Almost surely, 2^661466676301 is an apocalyptic number.

It is an amenable number.

661466676301 is a deficient number, since it is larger than the sum of its proper divisors (425929871).

661466676301 is a wasteful number, since it uses less digits than its factorization.

661466676301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425929870.

The product of its (nonzero) digits is 3919104, while the sum is 52.

The spelling of 661466676301 in words is "six hundred sixty-one billion, four hundred sixty-six million, six hundred seventy-six thousand, three hundred one".