66743406737 has 8 divisors (see below), whose sum is σ = 76582078272. Its totient is φ = 56980710000.

The previous prime is 66743406659. The next prime is 66743406781. The reversal of 66743406737 is 73760434766.

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 66743406737 - 2¹² = 66743402641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66743406437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18991814 + ... + 18995327.

It is an arithmetic number, because the mean of its divisors is an integer number (9572759784).

Almost surely, 2^66743406737 is an apocalyptic number.

It is an amenable number.

66743406737 is a deficient number, since it is larger than the sum of its proper divisors (9838671535).

66743406737 is a wasteful number, since it uses less digits than its factorization.

66743406737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37987399.

The product of its (nonzero) digits is 10668672, while the sum is 53.

The spelling of 66743406737 in words is "sixty-six billion, seven hundred forty-three million, four hundred six thousand, seven hundred thirty-seven".