66160071 has 20 divisors (see below), whose sum is σ = 104035800. Its totient is φ = 41784336.

The previous prime is 66160069. The next prime is 66160079. The reversal of 66160071 is 17006166.

It is not a de Polignac number, because 66160071 - 2¹ = 66160069 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66160079) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 19956 + ... + 23033.

It is an arithmetic number, because the mean of its divisors is an integer number (5201790).

Almost surely, 2^66160071 is an apocalyptic number.

66160071 is a deficient number, since it is larger than the sum of its proper divisors (37875729).

66160071 is a wasteful number, since it uses less digits than its factorization.

66160071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43020 (or 43011 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 66160071 is about 8133.8841275248. The cubic root of 66160071 is about 404.4504480558.

The spelling of 66160071 in words is "sixty-six million, one hundred sixty thousand, seventy-one".