66666666734 has 8 divisors (see below), whose sum is σ = 100257070680. Its totient is φ = 33247643176.

The previous prime is 66666666713. The next prime is 66666666811. The reversal of 66666666734 is 43766666666.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-6 number, since 6×66666666734⁶ (a number of 66 digits) contains 666666 as substring.

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, 42844124 + ... + 42845679.

It is an arithmetic number, because the mean of its divisors is an integer number (12532133835).

Almost surely, 2^66666666734 is an apocalyptic number.

66666666734 is a deficient number, since it is larger than the sum of its proper divisors (33590403946).

66666666734 is a wasteful number, since it uses less digits than its factorization.

66666666734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85690194.

The product of its digits is 141087744, while the sum is 62.

The spelling of 66666666734 in words is "sixty-six billion, six hundred sixty-six million, six hundred sixty-six thousand, seven hundred thirty-four".