71661364 has 6 divisors (see below), whose sum is σ = 125407394. Its totient is φ = 35830680.

The previous prime is 71661361. The next prime is 71661371. The reversal of 71661364 is 46316617.

It can be written as a sum of positive squares in only one way, i.e., 57912100 + 13749264 = 7610^2 + 3708^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71661361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8957667 + ... + 8957674.

Almost surely, 2^71661364 is an apocalyptic number.

It is an amenable number.

71661364 is a deficient number, since it is larger than the sum of its proper divisors (53746030).

71661364 is a wasteful number, since it uses less digits than its factorization.

71661364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17915345 (or 17915343 counting only the distinct ones).

The product of its digits is 18144, while the sum is 34.

The square root of 71661364 is about 8465.3035385626. The cubic root of 71661364 is about 415.3635252807.

The spelling of 71661364 in words is "seventy-one million, six hundred sixty-one thousand, three hundred sixty-four".