666666740734 has 4 divisors (see below), whose sum is σ = 1000000111104. Its totient is φ = 333333370366.

The previous prime is 666666740731. The next prime is 666666740767. The reversal of 666666740734 is 437047666666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666666740731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166666685182 + ... + 166666685185.

It is an arithmetic number, because the mean of its divisors is an integer number (250000027776).

Almost surely, 2^666666740734 is an apocalyptic number.

666666740734 is a deficient number, since it is larger than the sum of its proper divisors (333333370370).

666666740734 is a wasteful number, since it uses less digits than its factorization.

666666740734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333333370369.

The product of its (nonzero) digits is 109734912, while the sum is 61.

The spelling of 666666740734 in words is "six hundred sixty-six billion, six hundred sixty-six million, seven hundred forty thousand, seven hundred thirty-four".