71350666 has 16 divisors (see below), whose sum is σ = 113549256. Its totient is φ = 33509376.

The previous prime is 71350661. The next prime is 71350673. The reversal of 71350666 is 66605317.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 68409441 + 2941225 = 8271^2 + 1715^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (71350661) 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, 17800 + ... + 21436.

Almost surely, 2^71350666 is an apocalyptic number.

71350666 is a deficient number, since it is larger than the sum of its proper divisors (42198590).

71350666 is a wasteful number, since it uses less digits than its factorization.

71350666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4233.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 71350666 is about 8446.9323425727. The cubic root of 71350666 is about 414.7623664947.

The spelling of 71350666 in words is "seventy-one million, three hundred fifty thousand, six hundred sixty-six".