66402431500 has 48 divisors (see below), whose sum is σ = 148560100416. Its totient is φ = 25913136000.

The previous prime is 66402431483. The next prime is 66402431521. The reversal of 66402431500 is 513420466.

It is a super-2 number, since 2×66402431500² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1599072 + ... + 1640071.

It is an arithmetic number, because the mean of its divisors is an integer number (3095002092).

Almost surely, 2^66402431500 is an apocalyptic number.

It is an amenable number.

66402431500 is an abundant number, since it is smaller than the sum of its proper divisors (82157668916).

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

66402431500 is a wasteful number, since it uses less digits than its factorization.

66402431500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3239203 (or 3239191 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 66402431500 its reverse (513420466), we get a palindrome (66915851966).

The spelling of 66402431500 in words is "sixty-six billion, four hundred two million, four hundred thirty-one thousand, five hundred".