71666704 has 40 divisors (see below), whose sum is σ = 142773848. Its totient is φ = 34836480.

The previous prime is 71666701. The next prime is 71666717. The reversal of 71666704 is 40766617.

It can be written as a sum of positive squares in 4 ways, for example, as 1106704 + 70560000 = 1052^2 + 8400^2 .

It is a super-2 number, since 2×71666704² = 10272232924447232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71666701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94294 + ... + 95050.

Almost surely, 2^71666704 is an apocalyptic number.

It is an amenable number.

71666704 is a deficient number, since it is larger than the sum of its proper divisors (71107144).

71666704 is a wasteful number, since it uses less digits than its factorization.

71666704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 917 counting only the distinct ones).

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

The square root of 71666704 is about 8465.6189377978. The cubic root of 71666704 is about 415.3738422587.

The spelling of 71666704 in words is "seventy-one million, six hundred sixty-six thousand, seven hundred four".