66134656634666 has 4 divisors (see below), whose sum is σ = 99201984952002. Its totient is φ = 33067328317332.

The previous prime is 66134656634659. The next prime is 66134656634687. The reversal of 66134656634666 is 66643665643166.

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

It can be written as a sum of positive squares in only one way, i.e., 64036565221225 + 2098091413441 = 8002285^2 + 1448479^2 .

It is a super-3 number, since 3×66134656634666³ (a number of 42 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66134656634596 and 66134656634605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16533664158665 + ... + 16533664158668.

Almost surely, 2^{66134656634666} is an apocalyptic number.

66134656634666 is a deficient number, since it is larger than the sum of its proper divisors (33067328317336).

66134656634666 is a wasteful number, since it uses less digits than its factorization.

66134656634666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33067328317335.

The product of its digits is 1209323520, while the sum is 68.

The spelling of 66134656634666 in words is "sixty-six trillion, one hundred thirty-four billion, six hundred fifty-six million, six hundred thirty-four thousand, six hundred sixty-six".