71668503 has 8 divisors (see below), whose sum is σ = 106175600. Its totient is φ = 47778984.

The previous prime is 71668453. The next prime is 71668511. The reversal of 71668503 is 30586617.

It is not a de Polignac number, because 71668503 - 2⁹ = 71667991 is a prime.

It is a super-2 number, since 2×71668503² = 10272748644522018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71668543) 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, 1327168 + ... + 1327221.

It is an arithmetic number, because the mean of its divisors is an integer number (13271950).

Almost surely, 2^71668503 is an apocalyptic number.

71668503 is a deficient number, since it is larger than the sum of its proper divisors (34507097).

71668503 is a wasteful number, since it uses less digits than its factorization.

71668503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2654398 (or 2654392 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 71668503 is about 8465.7251904370. The cubic root of 71668503 is about 415.3773178443.

The spelling of 71668503 in words is "seventy-one million, six hundred sixty-eight thousand, five hundred three".