66666667342 has 64 divisors (see below), whose sum is σ = 119084774400. Its totient is φ = 27671015680.

The previous prime is 66666667337. The next prime is 66666667369. The reversal of 66666667342 is 24376666666.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1280463 + ... + 1331509.

It is an arithmetic number, because the mean of its divisors is an integer number (1860699600).

Almost surely, 2^66666667342 is an apocalyptic number.

66666667342 is a deficient number, since it is larger than the sum of its proper divisors (52418107058).

66666667342 is a wasteful number, since it uses less digits than its factorization.

66666667342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51201.

The product of its digits is 47029248, while the sum is 58.

The spelling of 66666667342 in words is "sixty-six billion, six hundred sixty-six million, six hundred sixty-seven thousand, three hundred forty-two".