66426818075 has 12 divisors (see below), whose sum is σ = 85950527088. Its totient is φ = 50830956000.

The previous prime is 66426818039. The next prime is 66426818111. The reversal of 66426818075 is 57081862466.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (66426818039) and next prime (66426818111).

It is not a de Polignac number, because 66426818075 - 2⁸ = 66426817819 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57761876 + ... + 57763025.

It is an arithmetic number, because the mean of its divisors is an integer number (7162543924).

Almost surely, 2^66426818075 is an apocalyptic number.

66426818075 is a deficient number, since it is larger than the sum of its proper divisors (19523709013).

66426818075 is a wasteful number, since it uses less digits than its factorization.

66426818075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115524934 (or 115524929 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 66426818075 in words is "sixty-six billion, four hundred twenty-six million, eight hundred eighteen thousand, seventy-five".