66740737727 has 8 divisors (see below), whose sum is σ = 66864766080. Its totient is φ = 66616818840.

The previous prime is 66740737709. The next prime is 66740737729. The reversal of 66740737727 is 72773704766.

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 66740737727 - 2⁸ = 66740737471 is a prime.

It is a super-2 number, since 2×66740737727² (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 (66740737729) 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, 1247702 + ... + 1300092.

It is an arithmetic number, because the mean of its divisors is an integer number (8358095760).

Almost surely, 2^66740737727 is an apocalyptic number.

66740737727 is a deficient number, since it is larger than the sum of its proper divisors (124028353).

66740737727 is a wasteful number, since it uses less digits than its factorization.

66740737727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54733.

The product of its (nonzero) digits is 14521248, while the sum is 56.

The spelling of 66740737727 in words is "sixty-six billion, seven hundred forty million, seven hundred thirty-seven thousand, seven hundred twenty-seven".