71178066 has 48 divisors (see below), whose sum is σ = 164617440. Its totient is φ = 22161600.

The previous prime is 71178059. The next prime is 71178067. The reversal of 71178066 is 66087117.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 71178066.

It is not an unprimeable number, because it can be changed into a prime (71178067) 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 23 ways as a sum of consecutive naturals, for example, 23541 + ... + 26391.

It is an arithmetic number, because the mean of its divisors is an integer number (3429530).

Almost surely, 2^71178066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71178066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82308720).

71178066 is an abundant number, since it is smaller than the sum of its proper divisors (93439374).

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

71178066 is a wasteful number, since it uses less digits than its factorization.

71178066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951 (or 2948 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 71178066 is about 8436.7094296295. The cubic root of 71178066 is about 414.4276544270.

The spelling of 71178066 in words is "seventy-one million, one hundred seventy-eight thousand, sixty-six".