71665036 has 24 divisors (see below), whose sum is σ = 134830080. Its totient is φ = 33222672.

The previous prime is 71665021. The next prime is 71665051. The reversal of 71665036 is 63056617.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (71665021) and next prime (71665051).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 71664992 and 71665010.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6460 + ... + 13603.

It is an arithmetic number, because the mean of its divisors is an integer number (5617920).

Almost surely, 2^71665036 is an apocalyptic number.

71665036 is a gapful number since it is divisible by the number (76) formed by its first and last digit.

It is an amenable number.

71665036 is a deficient number, since it is larger than the sum of its proper divisors (63165044).

71665036 is a wasteful number, since it uses less digits than its factorization.

71665036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20133 (or 20131 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 71665036 is about 8465.5204210964. The cubic root of 71665036 is about 415.3706197071.

The spelling of 71665036 in words is "seventy-one million, six hundred sixty-five thousand, thirty-six".