66666734 has 8 divisors (see below), whose sum is σ = 100599408. Its totient is φ = 33133600.

The previous prime is 66666731. The next prime is 66666749. The reversal of 66666734 is 43766666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66666731) 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, 99467 + ... + 100134.

It is an arithmetic number, because the mean of its divisors is an integer number (12574926).

Almost surely, 2^66666734 is an apocalyptic number.

66666734 is a deficient number, since it is larger than the sum of its proper divisors (33932674).

66666734 is a wasteful number, since it uses less digits than its factorization.

66666734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199770.

The product of its digits is 653184, while the sum is 44.

The square root of 66666734 is about 8164.9699325840. The cubic root of 66666734 is about 405.4802695498.

It can be divided in two parts, 6666 and 6734, that multiplied together give a palindrome (44888844).

The spelling of 66666734 in words is "sixty-six million, six hundred sixty-six thousand, seven hundred thirty-four".