66313611158 has 4 divisors (see below), whose sum is σ = 99470416740. Its totient is φ = 33156805578.

The previous prime is 66313611151. The next prime is 66313611167. The reversal of 66313611158 is 85111631366.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85111631366 = 2 ⋅42555815683.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66313611151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16578402788 + ... + 16578402791.

It is an arithmetic number, because the mean of its divisors is an integer number (24867604185).

Almost surely, 2^66313611158 is an apocalyptic number.

66313611158 is a deficient number, since it is larger than the sum of its proper divisors (33156805582).

66313611158 is a wasteful number, since it uses less digits than its factorization.

66313611158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33156805581.

The product of its digits is 77760, while the sum is 41.

The spelling of 66313611158 in words is "sixty-six billion, three hundred thirteen million, six hundred eleven thousand, one hundred fifty-eight".