66248740431 has 16 divisors (see below), whose sum is σ = 98804988000. Its totient is φ = 43869409344.

The previous prime is 66248740351. The next prime is 66248740507. The reversal of 66248740431 is 13404784266.

It is not a de Polignac number, because 66248740431 - 2⁹ = 66248739919 is a prime.

It is a super-2 number, since 2×66248740431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66248740231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8229726 + ... + 8237771.

It is an arithmetic number, because the mean of its divisors is an integer number (6175311750).

Almost surely, 2^66248740431 is an apocalyptic number.

66248740431 is a deficient number, since it is larger than the sum of its proper divisors (32556247569).

66248740431 is a wasteful number, since it uses less digits than its factorization.

66248740431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16467655 (or 16467649 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 66248740431 in words is "sixty-six billion, two hundred forty-eight million, seven hundred forty thousand, four hundred thirty-one".