66717038537 has 8 divisors (see below), whose sum is σ = 67416688416. Its totient is φ = 66017630592.

The previous prime is 66717038533. The next prime is 66717038551. The reversal of 66717038537 is 73583071766.

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

It is a cyclic number.

It is not a de Polignac number, because 66717038537 - 2² = 66717038533 is a prime.

It is a super-2 number, since 2×66717038537² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66717038533) 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, 523298 + ... + 638180.

It is an arithmetic number, because the mean of its divisors is an integer number (8427086052).

Almost surely, 2^66717038537 is an apocalyptic number.

It is an amenable number.

66717038537 is a deficient number, since it is larger than the sum of its proper divisors (699649879).

66717038537 is a wasteful number, since it uses less digits than its factorization.

66717038537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120967.

The product of its (nonzero) digits is 4445280, while the sum is 53.

The spelling of 66717038537 in words is "sixty-six billion, seven hundred seventeen million, thirty-eight thousand, five hundred thirty-seven".