71166621720510 has 96 divisors (see below), whose sum is σ = 193087574184960. Its totient is φ = 18151758465984.

The previous prime is 71166621720497. The next prime is 71166621720527. The reversal of 71166621720510 is 1502712666117.

It is a super-2 number, since 2×71166621720510² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42058657 + ... + 43718003.

It is an arithmetic number, because the mean of its divisors is an integer number (2011328897760).

Almost surely, 2^{71166621720510} is an apocalyptic number.

71166621720510 is an abundant number, since it is smaller than the sum of its proper divisors (121920952464450).

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

71166621720510 is a wasteful number, since it uses less digits than its factorization.

71166621720510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1680102 (or 1680099 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 71166621720510 in words is "seventy-one trillion, one hundred sixty-six billion, six hundred twenty-one million, seven hundred twenty thousand, five hundred ten".