71666722 has 8 divisors (see below), whose sum is σ = 107537436. Its totient is φ = 35820912.

The previous prime is 71666717. The next prime is 71666741. The reversal of 71666722 is 22766617.

It can be written as a sum of positive squares in 2 ways, for example, as 56836521 + 14830201 = 7539^2 + 3851^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71666722² = 10272238084450568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5068 + ... + 13000.

Almost surely, 2^71666722 is an apocalyptic number.

71666722 is a deficient number, since it is larger than the sum of its proper divisors (35870714).

71666722 is a wasteful number, since it uses less digits than its factorization.

71666722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12452.

The product of its digits is 42336, while the sum is 37.

The square root of 71666722 is about 8465.6200009214. The cubic root of 71666722 is about 415.3738770341.

The spelling of 71666722 in words is "seventy-one million, six hundred sixty-six thousand, seven hundred twenty-two".