71668725 has 24 divisors (see below), whose sum is σ = 118837632. Its totient is φ = 38112000.

The previous prime is 71668711. The next prime is 71668733. The reversal of 71668725 is 52786617.

It is not a de Polignac number, because 71668725 - 2¹⁴ = 71652341 is a prime.

It is a super-2 number, since 2×71668725² = 10272812286251250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28884 + ... + 31266.

It is an arithmetic number, because the mean of its divisors is an integer number (4951568).

Almost surely, 2^71668725 is an apocalyptic number.

71668725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

71668725 is a deficient number, since it is larger than the sum of its proper divisors (47168907).

71668725 is a wasteful number, since it uses less digits than its factorization.

71668725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2797 (or 2792 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 71668725 is about 8465.7383021211. The cubic root of 71668725 is about 415.3777467341.

The spelling of 71668725 in words is "seventy-one million, six hundred sixty-eight thousand, seven hundred twenty-five".