71672068 has 24 divisors (see below), whose sum is σ = 143021592. Its totient is φ = 31133184.

The previous prime is 71672063. The next prime is 71672087. The reversal of 71672068 is 86027617.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21233664 + 50438404 = 4608^2 + 7102^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71672063) 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, 39655 + ... + 41422.

It is an arithmetic number, because the mean of its divisors is an integer number (5959233).

Almost surely, 2^71672068 is an apocalyptic number.

It is an amenable number.

71672068 is a deficient number, since it is larger than the sum of its proper divisors (71349524).

71672068 is a wasteful number, since it uses less digits than its factorization.

71672068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81111 (or 81109 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 71672068 is about 8465.9357427280. The cubic root of 71672068 is about 415.3842050891.

The spelling of 71672068 in words is "seventy-one million, six hundred seventy-two thousand, sixty-eight".