71660371 has 4 divisors (see below), whose sum is σ = 72669744. Its totient is φ = 70651000.

The previous prime is 71660353. The next prime is 71660431. The reversal of 71660371 is 17306617.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71660371 - 2²³ = 63271763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71660311) 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 in 3 ways as a sum of consecutive naturals, for example, 504580 + ... + 504721.

It is an arithmetic number, because the mean of its divisors is an integer number (18167436).

Almost surely, 2^71660371 is an apocalyptic number.

71660371 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

71660371 is a deficient number, since it is larger than the sum of its proper divisors (1009373).

71660371 is a wasteful number, since it uses less digits than its factorization.

71660371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009372.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 71660371 is about 8465.2448871843. The cubic root of 71660371 is about 415.3616067300.

Adding to 71660371 its reverse (17306617), we get a palindrome (88966988).

The spelling of 71660371 in words is "seventy-one million, six hundred sixty thousand, three hundred seventy-one".