71966141 has 4 divisors (see below), whose sum is σ = 77502012. Its totient is φ = 66430272.

The previous prime is 71966137. The next prime is 71966171. The reversal of 71966141 is 14166917.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41550916 + 30415225 = 6446^2 + 5515^2 .

It is a cyclic number.

It is not a de Polignac number, because 71966141 - 2² = 71966137 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71966171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2767916 + ... + 2767941.

It is an arithmetic number, because the mean of its divisors is an integer number (19375503).

Almost surely, 2^71966141 is an apocalyptic number.

It is an amenable number.

71966141 is a deficient number, since it is larger than the sum of its proper divisors (5535871).

71966141 is a wasteful number, since it uses less digits than its factorization.

71966141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5535870.

The product of its digits is 9072, while the sum is 35.

The square root of 71966141 is about 8483.2859789117. The cubic root of 71966141 is about 415.9515418315.

The spelling of 71966141 in words is "seventy-one million, nine hundred sixty-six thousand, one hundred forty-one".