521071660070 has 64 divisors (see below), whose sum is σ = 1013278242816. Its totient is φ = 191786797440.

The previous prime is 521071660063. The next prime is 521071660139. The reversal of 521071660070 is 70066170125.

It is a self number, because there is not a number n which added to its sum of digits gives 521071660070.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81072197 + ... + 81078623.

It is an arithmetic number, because the mean of its divisors is an integer number (15832472544).

Almost surely, 2^521071660070 is an apocalyptic number.

521071660070 is a deficient number, since it is larger than the sum of its proper divisors (492206582746).

521071660070 is a wasteful number, since it uses less digits than its factorization.

521071660070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8325.

The product of its (nonzero) digits is 17640, while the sum is 35.

The spelling of 521071660070 in words is "five hundred twenty-one billion, seventy-one million, six hundred sixty thousand, seventy".