66715135022 has 4 divisors (see below), whose sum is σ = 100072702536. Its totient is φ = 33357567510.

The previous prime is 66715134973. The next prime is 66715135027. The reversal of 66715135022 is 22053151766.

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: 22053151766 = 2 ⋅11026575883.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66715135027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16678783754 + ... + 16678783757.

It is an arithmetic number, because the mean of its divisors is an integer number (25018175634).

Almost surely, 2^66715135022 is an apocalyptic number.

66715135022 is a deficient number, since it is larger than the sum of its proper divisors (33357567514).

66715135022 is a wasteful number, since it uses less digits than its factorization.

66715135022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33357567513.

The product of its (nonzero) digits is 75600, while the sum is 38.

Adding to 66715135022 its reverse (22053151766), we get a palindrome (88768286788).

The spelling of 66715135022 in words is "sixty-six billion, seven hundred fifteen million, one hundred thirty-five thousand, twenty-two".