66927471 has 8 divisors (see below), whose sum is σ = 96101040. Its totient is φ = 41186112.

The previous prime is 66927467. The next prime is 66927503. The reversal of 66927471 is 17472966.

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

It is not a de Polignac number, because 66927471 - 2² = 66927467 is a prime.

It is a super-3 number, since 3×66927471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66927271) 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, 858006 + ... + 858083.

It is an arithmetic number, because the mean of its divisors is an integer number (12012630).

Almost surely, 2^66927471 is an apocalyptic number.

66927471 is a deficient number, since it is larger than the sum of its proper divisors (29173569).

66927471 is a wasteful number, since it uses less digits than its factorization.

66927471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716105.

The product of its digits is 127008, while the sum is 42.

The square root of 66927471 is about 8180.9211584026. The cubic root of 66927471 is about 406.0081999040.

The spelling of 66927471 in words is "sixty-six million, nine hundred twenty-seven thousand, four hundred seventy-one".