66131262430 has 32 divisors (see below), whose sum is σ = 122943744000. Its totient is φ = 25585116960.

The previous prime is 66131262413. The next prime is 66131262467. The reversal of 66131262430 is 3426213166.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 514821 + ... + 630319.

It is an arithmetic number, because the mean of its divisors is an integer number (3841992000).

Almost surely, 2^66131262430 is an apocalyptic number.

66131262430 is a deficient number, since it is larger than the sum of its proper divisors (56812481570).

66131262430 is a wasteful number, since it uses less digits than its factorization.

66131262430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117384.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 66131262430 its reverse (3426213166), we get a palindrome (69557475596).

The spelling of 66131262430 in words is "sixty-six billion, one hundred thirty-one million, two hundred sixty-two thousand, four hundred thirty".