66318485 has 8 divisors (see below), whose sum is σ = 79732536. Its totient is φ = 52954560.

The previous prime is 66318481. The next prime is 66318491. The reversal of 66318485 is 58481366.

It can be written as a sum of positive squares in 4 ways, for example, as 935089 + 65383396 = 967^2 + 8086^2 .

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

It is not a de Polignac number, because 66318485 - 2² = 66318481 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 (66318481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9554 + ... + 14963.

It is an arithmetic number, because the mean of its divisors is an integer number (9966567).

Almost surely, 2^66318485 is an apocalyptic number.

It is an amenable number.

66318485 is a deficient number, since it is larger than the sum of its proper divisors (13414051).

66318485 is a wasteful number, since it uses less digits than its factorization.

66318485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25063.

The product of its digits is 138240, while the sum is 41.

The square root of 66318485 is about 8143.6162114874. The cubic root of 66318485 is about 404.7729968037.

The spelling of 66318485 in words is "sixty-six million, three hundred eighteen thousand, four hundred eighty-five".