71670216 has 16 divisors (see below), whose sum is σ = 179175600. Its totient is φ = 23890064.

The previous prime is 71670211. The next prime is 71670217. The reversal of 71670216 is 61207617.

It is a happy number.

It is a super-2 number, since 2×71670216² = 10273239722973312, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71670211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1493106 + ... + 1493153.

It is an arithmetic number, because the mean of its divisors is an integer number (11198475).

Almost surely, 2^71670216 is an apocalyptic number.

It is an amenable number.

71670216 is an abundant number, since it is smaller than the sum of its proper divisors (107505384).

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

71670216 is a wasteful number, since it uses less digits than its factorization.

71670216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2986268 (or 2986264 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 71670216 is about 8465.8263625000. The cubic root of 71670216 is about 415.3806272277.

The spelling of 71670216 in words is "seventy-one million, six hundred seventy thousand, two hundred sixteen".