66954719109 has 8 divisors (see below), whose sum is σ = 90495876352. Its totient is φ = 44025020640.

The previous prime is 66954719081. The next prime is 66954719131. The reversal of 66954719109 is 90191745966.

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

It is not a de Polignac number, because 66954719109 - 2¹² = 66954715013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66954719159) 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, 152864437 + ... + 152864874.

It is an arithmetic number, because the mean of its divisors is an integer number (11311984544).

Almost surely, 2^66954719109 is an apocalyptic number.

It is an amenable number.

66954719109 is a deficient number, since it is larger than the sum of its proper divisors (23541157243).

66954719109 is a wasteful number, since it uses less digits than its factorization.

66954719109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305729387.

The product of its (nonzero) digits is 3674160, while the sum is 57.

The spelling of 66954719109 in words is "sixty-six billion, nine hundred fifty-four million, seven hundred nineteen thousand, one hundred nine".