66660723301 has 4 divisors (see below), whose sum is σ = 66661250400. Its totient is φ = 66660196204.

The previous prime is 66660723263. The next prime is 66660723313. The reversal of 66660723301 is 10332706666.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 66660723301 - 2²¹ = 66658626149 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 (66660723331) 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, 52440 + ... + 368878.

It is an arithmetic number, because the mean of its divisors is an integer number (16665312600).

Almost surely, 2^66660723301 is an apocalyptic number.

It is an amenable number.

66660723301 is a deficient number, since it is larger than the sum of its proper divisors (527099).

66660723301 is a wasteful number, since it uses less digits than its factorization.

66660723301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527098.

The product of its (nonzero) digits is 163296, while the sum is 40.

The spelling of 66660723301 in words is "sixty-six billion, six hundred sixty million, seven hundred twenty-three thousand, three hundred one".