66667340734 has 4 divisors (see below), whose sum is σ = 100001011104. Its totient is φ = 33333670366.

The previous prime is 66667340717. The next prime is 66667340767. The reversal of 66667340734 is 43704376666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16666835182 + ... + 16666835185.

It is an arithmetic number, because the mean of its divisors is an integer number (25000252776).

Almost surely, 2^66667340734 is an apocalyptic number.

66667340734 is a deficient number, since it is larger than the sum of its proper divisors (33333670370).

66667340734 is a wasteful number, since it uses less digits than its factorization.

66667340734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33333670369.

The product of its (nonzero) digits is 9144576, while the sum is 52.

The spelling of 66667340734 in words is "sixty-six billion, six hundred sixty-seven million, three hundred forty thousand, seven hundred thirty-four".