70664481 has 20 divisors (see below), whose sum is σ = 105802884. Its totient is φ = 47001600.

The previous prime is 70664471. The next prime is 70664497. The reversal of 70664481 is 18446607.

70664481 is a `hidden beast` number, since 7 + 0 + 6 + 644 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 39125025 + 31539456 = 6255^2 + 5616^2 .

It is not a de Polignac number, because 70664481 - 2⁷ = 70664353 is a prime.

It is a super-2 number, since 2×70664481² = 9986937749998722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (70664471) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 51241 + ... + 52601.

Almost surely, 2^70664481 is an apocalyptic number.

It is an amenable number.

70664481 is a deficient number, since it is larger than the sum of its proper divisors (35138403).

70664481 is a wasteful number, since it uses less digits than its factorization.

70664481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014 (or 2005 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 70664481 is about 8406.2168066259. The cubic root of 70664481 is about 413.4284804517.

The spelling of 70664481 in words is "seventy million, six hundred sixty-four thousand, four hundred eighty-one".