66592236981 has 8 divisors (see below), whose sum is σ = 88791792160. Its totient is φ = 44393753232.

The previous prime is 66592236961. The next prime is 66592237007. The reversal of 66592236981 is 18963229566.

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

It is not a de Polignac number, because 66592236981 - 2⁶ = 66592236917 is a prime.

It is a super-2 number, since 2×66592236981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66592236911) 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 7 ways as a sum of consecutive naturals, for example, 109450 + ... + 381003.

It is an arithmetic number, because the mean of its divisors is an integer number (11098974020).

Almost surely, 2^66592236981 is an apocalyptic number.

It is an amenable number.

66592236981 is a deficient number, since it is larger than the sum of its proper divisors (22199555179).

66592236981 is a wasteful number, since it uses less digits than its factorization.

66592236981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535715.

The product of its digits is 8398080, while the sum is 57.

The spelling of 66592236981 in words is "sixty-six billion, five hundred ninety-two million, two hundred thirty-six thousand, nine hundred eighty-one".