66740747471 has 8 divisors (see below), whose sum is σ = 68186432160. Its totient is φ = 65310524928.

The previous prime is 66740747443. The next prime is 66740747477. The reversal of 66740747471 is 17474704766.

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 66740747471 - 2¹⁰ = 66740746447 is a prime.

It is a super-3 number, since 3×66740747471³ (a number of 33 digits) contains 333 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 (66740747477) 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, 3856811 + ... + 3874076.

It is an arithmetic number, because the mean of its divisors is an integer number (8523304020).

Almost surely, 2^66740747471 is an apocalyptic number.

66740747471 is a deficient number, since it is larger than the sum of its proper divisors (1445684689).

66740747471 is an equidigital number, since it uses as much as digits as its factorization.

66740747471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7731073.

The product of its (nonzero) digits is 5531904, while the sum is 53.

The spelling of 66740747471 in words is "sixty-six billion, seven hundred forty million, seven hundred forty-seven thousand, four hundred seventy-one".