66905442373 has 8 divisors (see below), whose sum is σ = 83414577600. Its totient is φ = 52134110880.

The previous prime is 66905442367. The next prime is 66905442379. The reversal of 66905442373 is 37324450966.

It is an interprime number because it is at equal distance from previous prime (66905442367) and next prime (66905442379).

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

It is a cyclic number.

It is not a de Polignac number, because 66905442373 - 2⁹ = 66905441861 is a prime.

It is a super-2 number, since 2×66905442373² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66905442379) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434450848 + ... + 434451001.

It is an arithmetic number, because the mean of its divisors is an integer number (10426822200).

Almost surely, 2^66905442373 is an apocalyptic number.

It is an amenable number.

66905442373 is a deficient number, since it is larger than the sum of its proper divisors (16509135227).

66905442373 is a wasteful number, since it uses less digits than its factorization.

66905442373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868901867.

The product of its (nonzero) digits is 3265920, while the sum is 49.

The spelling of 66905442373 in words is "sixty-six billion, nine hundred five million, four hundred forty-two thousand, three hundred seventy-three".