70664538 has 16 divisors (see below), whose sum is σ = 161519040. Its totient is φ = 20189856.

The previous prime is 70664497. The next prime is 70664543. The reversal of 70664538 is 83546607.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70664496 and 70664505.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 841203 + ... + 841286.

It is an arithmetic number, because the mean of its divisors is an integer number (10094940).

Almost surely, 2^70664538 is an apocalyptic number.

70664538 is an abundant number, since it is smaller than the sum of its proper divisors (90854502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70664538 is a wasteful number, since it uses less digits than its factorization.

70664538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1682501.

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 70664538 is about 8406.2201969732. The cubic root of 70664538 is about 413.4285916128.

The spelling of 70664538 in words is "seventy million, six hundred sixty-four thousand, five hundred thirty-eight".