66160405 has 8 divisors (see below), whose sum is σ = 79440984. Its totient is φ = 52896000.

The previous prime is 66160399. The next prime is 66160433. The reversal of 66160405 is 50406166.

It can be written as a sum of positive squares in 4 ways, for example, as 27447121 + 38713284 = 5239^2 + 6222^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 66160405 - 2²¹ = 64063253 is a prime.

It is a Duffinian number.

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, 8505 + ... + 14305.

It is an arithmetic number, because the mean of its divisors is an integer number (9930123).

Almost surely, 2^66160405 is an apocalyptic number.

It is an amenable number.

66160405 is a deficient number, since it is larger than the sum of its proper divisors (13280579).

66160405 is a wasteful number, since it uses less digits than its factorization.

66160405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8087.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 66160405 is about 8133.9046588954. The cubic root of 66160405 is about 404.4511286588.

The spelling of 66160405 in words is "sixty-six million, one hundred sixty thousand, four hundred five".