66238124538 has 16 divisors (see below), whose sum is σ = 132479444736. Its totient is φ = 22078842240.

The previous prime is 66238124521. The next prime is 66238124587. The reversal of 66238124538 is 83542183266.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200695 + ... + 415637.

It is an arithmetic number, because the mean of its divisors is an integer number (8279965296).

Almost surely, 2^66238124538 is an apocalyptic number.

66238124538 is an abundant number, since it is smaller than the sum of its proper divisors (66241320198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66238124538 is a wasteful number, since it uses less digits than its factorization.

66238124538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266309.

The product of its digits is 1658880, while the sum is 48.

The spelling of 66238124538 in words is "sixty-six billion, two hundred thirty-eight million, one hundred twenty-four thousand, five hundred thirty-eight".