66472471 has 4 divisors (see below), whose sum is σ = 71585752. Its totient is φ = 61359192.

The previous prime is 66472457. The next prime is 66472477. The reversal of 66472471 is 17427466.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66472471 - 2²¹ = 64375319 is a prime.

It is a super-3 number, since 3×66472471³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66472471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66472477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2556621 + ... + 2556646.

It is an arithmetic number, because the mean of its divisors is an integer number (17896438).

Almost surely, 2^66472471 is an apocalyptic number.

66472471 is a deficient number, since it is larger than the sum of its proper divisors (5113281).

66472471 is a wasteful number, since it uses less digits than its factorization.

66472471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5113280.

The product of its digits is 56448, while the sum is 37.

The square root of 66472471 is about 8153.0651291401. The cubic root of 66472471 is about 405.0860377084.

The spelling of 66472471 in words is "sixty-six million, four hundred seventy-two thousand, four hundred seventy-one".