66471277 has 8 divisors (see below), whose sum is σ = 70623000. Its totient is φ = 62443584.

The previous prime is 66471239. The next prime is 66471281. The reversal of 66471277 is 77217466.

It can be written as a sum of positive squares in 4 ways, for example, as 26894596 + 39576681 = 5186^2 + 6291^2 .

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 66471277 - 2¹⁵ = 66438509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66471217) 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, 29902 + ... + 32047.

It is an arithmetic number, because the mean of its divisors is an integer number (8827875).

Almost surely, 2^66471277 is an apocalyptic number.

It is an amenable number.

66471277 is a deficient number, since it is larger than the sum of its proper divisors (4151723).

66471277 is a wasteful number, since it uses less digits than its factorization.

66471277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62015.

The product of its digits is 98784, while the sum is 40.

The square root of 66471277 is about 8152.9919048163. The cubic root of 66471277 is about 405.0836122651.

The spelling of 66471277 in words is "sixty-six million, four hundred seventy-one thousand, two hundred seventy-seven".