71669808 has 120 divisors (see below), whose sum is σ = 231908768. Its totient is φ = 20238336.

The previous prime is 71669803. The next prime is 71669809. The reversal of 71669808 is 80896617.

It is a happy number.

It is a super-2 number, since 2×71669808² = 10273122757513728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71669803) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 97410 + ... + 98142.

Almost surely, 2^71669808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71669808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115954384).

71669808 is an abundant number, since it is smaller than the sum of its proper divisors (160238960).

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

71669808 is a wasteful number, since it uses less digits than its factorization.

71669808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 842 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 71669808 is about 8465.8022655859. The cubic root of 71669808 is about 415.3798390081.

The spelling of 71669808 in words is "seventy-one million, six hundred sixty-nine thousand, eight hundred eight".