66124631511 has 12 divisors (see below), whose sum is σ = 98094799192. Its totient is φ = 42891652656.

The previous prime is 66124631509. The next prime is 66124631513. The reversal of 66124631511 is 11513642166.

66124631511 is a `hidden beast` number, since 6 + 6 + 1 + 2 + 4 + 631 + 5 + 11 = 666.

It is an interprime number because it is at equal distance from previous prime (66124631509) and next prime (66124631513).

It is not a de Polignac number, because 66124631511 - 2¹ = 66124631509 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 (66124631513) 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 11 ways as a sum of consecutive naturals, for example, 99285901 + ... + 99286566.

Almost surely, 2^66124631511 is an apocalyptic number.

66124631511 is a deficient number, since it is larger than the sum of its proper divisors (31970167681).

66124631511 is a wasteful number, since it uses less digits than its factorization.

66124631511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198572510 (or 198572507 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 66124631511 in words is "sixty-six billion, one hundred twenty-four million, six hundred thirty-one thousand, five hundred eleven".