71067618 has 40 divisors (see below), whose sum is σ = 160139628. Its totient is φ = 23556096.

The previous prime is 71067587. The next prime is 71067629. The reversal of 71067618 is 81676017.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70509609 + 558009 = 8397^2 + 747^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30130 + ... + 32402.

Almost surely, 2^71067618 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71067618, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80069814).

71067618 is an abundant number, since it is smaller than the sum of its proper divisors (89072010).

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

71067618 is a wasteful number, since it uses less digits than its factorization.

71067618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2480 (or 2471 counting only the distinct ones).

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

The square root of 71067618 is about 8430.1612084230. The cubic root of 71067618 is about 414.2131857292.

The spelling of 71067618 in words is "seventy-one million, sixty-seven thousand, six hundred eighteen".