66140110415 has 4 divisors (see below), whose sum is σ = 79368132504. Its totient is φ = 52912088328.

The previous prime is 66140110391. The next prime is 66140110423. The reversal of 66140110415 is 51401104166.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66140110415 - 2²⁰ = 66139061839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6614011037 + ... + 6614011046.

It is an arithmetic number, because the mean of its divisors is an integer number (19842033126).

Almost surely, 2^66140110415 is an apocalyptic number.

66140110415 is a deficient number, since it is larger than the sum of its proper divisors (13228022089).

66140110415 is a wasteful number, since it uses less digits than its factorization.

66140110415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13228022088.

The product of its (nonzero) digits is 2880, while the sum is 29.

The spelling of 66140110415 in words is "sixty-six billion, one hundred forty million, one hundred ten thousand, four hundred fifteen".