66667740371 has 16 divisors (see below), whose sum is σ = 69369216000. Its totient is φ = 63993894048.

The previous prime is 66667740323. The next prime is 66667740431. The reversal of 66667740371 is 17304776666.

It is a cyclic number.

It is not a de Polignac number, because 66667740371 - 2³⁴ = 49487871187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66667740301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5082980 + ... + 5096078.

It is an arithmetic number, because the mean of its divisors is an integer number (4335576000).

Almost surely, 2^66667740371 is an apocalyptic number.

66667740371 is a deficient number, since it is larger than the sum of its proper divisors (2701475629).

66667740371 is a wasteful number, since it uses less digits than its factorization.

66667740371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14138.

The product of its (nonzero) digits is 5334336, while the sum is 53.

The spelling of 66667740371 in words is "sixty-six billion, six hundred sixty-seven million, seven hundred forty thousand, three hundred seventy-one".