71625666 has 32 divisors (see below), whose sum is σ = 165795840. Its totient is φ = 20204496.

The previous prime is 71625661. The next prime is 71625667. The reversal of 71625666 is 66652617.

It is not an unprimeable number, because it can be changed into a prime (71625661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7476 + ... + 14111.

It is an arithmetic number, because the mean of its divisors is an integer number (5181120).

Almost surely, 2^71625666 is an apocalyptic number.

71625666 is an abundant number, since it is smaller than the sum of its proper divisors (94170174).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71625666 is a wasteful number, since it uses less digits than its factorization.

71625666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21678.

The product of its digits is 90720, while the sum is 39.

The square root of 71625666 is about 8463.1947868403. The cubic root of 71625666 is about 415.2945429212.

The spelling of 71625666 in words is "seventy-one million, six hundred twenty-five thousand, six hundred sixty-six".