64775471 has 2 divisors, whose sum is σ = 64775472. Its totient is φ = 64775470.

The previous prime is 64775467. The next prime is 64775507. The reversal of 64775471 is 17457746.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 64775471 - 2² = 64775467 is a prime.

It is a super-3 number, since 3×64775471³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64775411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32387735 + 32387736.

It is an arithmetic number, because the mean of its divisors is an integer number (32387736).

Almost surely, 2^64775471 is an apocalyptic number.

64775471 is a deficient number, since it is larger than the sum of its proper divisors (1).

64775471 is an equidigital number, since it uses as much as digits as its factorization.

64775471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 164640, while the sum is 41.

The square root of 64775471 is about 8048.3210050296. The cubic root of 64775471 is about 401.6090830333.

The spelling of 64775471 in words is "sixty-four million, seven hundred seventy-five thousand, four hundred seventy-one".