71661303 has 12 divisors (see below), whose sum is σ = 118298128. Its totient is φ = 40949280.

The previous prime is 71661277. The next prime is 71661313. The reversal of 71661303 is 30316617.

It is not a de Polignac number, because 71661303 - 2⁸ = 71661047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71661313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 568678 + ... + 568803.

Almost surely, 2^71661303 is an apocalyptic number.

71661303 is a deficient number, since it is larger than the sum of its proper divisors (46636825).

71661303 is a wasteful number, since it uses less digits than its factorization.

71661303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137494 (or 1137491 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 71661303 is about 8465.2999356195. The cubic root of 71661303 is about 415.3634074247.

The spelling of 71661303 in words is "seventy-one million, six hundred sixty-one thousand, three hundred three".