66297348491 has 12 divisors (see below), whose sum is σ = 73593813552. Its totient is φ = 59673570000.

The previous prime is 66297348479. The next prime is 66297348511. The reversal of 66297348491 is 19484379266.

It is not a de Polignac number, because 66297348491 - 2¹⁴ = 66297332107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66297348491.

It is not an unprimeable number, because it can be changed into a prime (66297342491) 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 11 ways as a sum of consecutive naturals, for example, 2700215 + ... + 2724656.

It is an arithmetic number, because the mean of its divisors is an integer number (6132817796).

Almost surely, 2^66297348491 is an apocalyptic number.

66297348491 is a deficient number, since it is larger than the sum of its proper divisors (7296465061).

66297348491 is a wasteful number, since it uses less digits than its factorization.

66297348491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5424994 (or 5424983 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 59.

The spelling of 66297348491 in words is "sixty-six billion, two hundred ninety-seven million, three hundred forty-eight thousand, four hundred ninety-one".