66437368607 has 4 divisors (see below), whose sum is σ = 66447278040. Its totient is φ = 66427459176.

The previous prime is 66437368601. The next prime is 66437368633. The reversal of 66437368607 is 70686373466.

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

It is a cyclic number.

It is not a de Polignac number, because 66437368607 - 2¹⁶ = 66437303071 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 (66437368601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4944653 + ... + 4958070.

It is an arithmetic number, because the mean of its divisors is an integer number (16611819510).

Almost surely, 2^66437368607 is an apocalyptic number.

66437368607 is a deficient number, since it is larger than the sum of its proper divisors (9909433).

66437368607 is an equidigital number, since it uses as much as digits as its factorization.

66437368607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9909432.

The product of its (nonzero) digits is 18289152, while the sum is 56.

The spelling of 66437368607 in words is "sixty-six billion, four hundred thirty-seven million, three hundred sixty-eight thousand, six hundred seven".