70664471 has 2 divisors, whose sum is σ = 70664472. Its totient is φ = 70664470.

The previous prime is 70664467. The next prime is 70664497. The reversal of 70664471 is 17446607.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70664471 - 2² = 70664467 is a prime.

It is a super-3 number, since 3×70664471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70664071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35332235 + 35332236.

It is an arithmetic number, because the mean of its divisors is an integer number (35332236).

Almost surely, 2^70664471 is an apocalyptic number.

70664471 is a deficient number, since it is larger than the sum of its proper divisors (1).

70664471 is an equidigital number, since it uses as much as digits as its factorization.

70664471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 70664471 is about 8406.2162118280. The cubic root of 70664471 is about 413.4284609498.

The spelling of 70664471 in words is "seventy million, six hundred sixty-four thousand, four hundred seventy-one".