71687670 has 16 divisors (see below), whose sum is σ = 172050480. Its totient is φ = 19116704.

The previous prime is 71687663. The next prime is 71687687. The reversal of 71687670 is 7678617.

It is a congruent number.

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, 1194765 + ... + 1194824.

It is an arithmetic number, because the mean of its divisors is an integer number (10753155).

Almost surely, 2^71687670 is an apocalyptic number.

71687670 is an abundant number, since it is smaller than the sum of its proper divisors (100362810).

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

71687670 is a wasteful number, since it uses less digits than its factorization.

71687670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2389599.

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 71687670 is about 8466.8571500882. The cubic root of 71687670 is about 415.4143439998.

The spelling of 71687670 in words is "seventy-one million, six hundred eighty-seven thousand, six hundred seventy".