66667743707 has 8 divisors (see below), whose sum is σ = 68477162496. Its totient is φ = 64858724352.

The previous prime is 66667743697. The next prime is 66667743733. The reversal of 66667743707 is 70734776666.

It is a happy number.

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

It is not a de Polignac number, because 66667743707 - 2²⁴ = 66650966491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66667743757) 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, 255398 + ... + 445604.

It is an arithmetic number, because the mean of its divisors is an integer number (8559645312).

Almost surely, 2^66667743707 is an apocalyptic number.

66667743707 is a deficient number, since it is larger than the sum of its proper divisors (1809418789).

66667743707 is a wasteful number, since it uses less digits than its factorization.

66667743707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199717.

The product of its (nonzero) digits is 37340352, while the sum is 59.

The spelling of 66667743707 in words is "sixty-six billion, six hundred sixty-seven million, seven hundred forty-three thousand, seven hundred seven".