66006734863 has 4 divisors (see below), whose sum is σ = 69480773560. Its totient is φ = 62532696168.

The previous prime is 66006734837. The next prime is 66006734869. The reversal of 66006734863 is 36843760066.

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 66006734863 - 2¹³ = 66006726671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66006734869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1737019320 + ... + 1737019357.

It is an arithmetic number, because the mean of its divisors is an integer number (17370193390).

Almost surely, 2^66006734863 is an apocalyptic number.

66006734863 is a deficient number, since it is larger than the sum of its proper divisors (3474038697).

66006734863 is a wasteful number, since it uses less digits than its factorization.

66006734863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474038696.

The product of its (nonzero) digits is 2612736, while the sum is 49.

The spelling of 66006734863 in words is "sixty-six billion, six million, seven hundred thirty-four thousand, eight hundred sixty-three".