66061313 has 8 divisors (see below), whose sum is σ = 69242688. Its totient is φ = 62905744.

The previous prime is 66061253. The next prime is 66061321. The reversal of 66061313 is 31316066.

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

It is a cyclic number.

It is not a de Polignac number, because 66061313 - 2⁸ = 66061057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66061343) 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, 1106 + ... + 11547.

It is an arithmetic number, because the mean of its divisors is an integer number (8655336).

Almost surely, 2^66061313 is an apocalyptic number.

It is an amenable number.

66061313 is a deficient number, since it is larger than the sum of its proper divisors (3181375).

66061313 is a wasteful number, since it uses less digits than its factorization.

66061313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12903.

The product of its (nonzero) digits is 1944, while the sum is 26.

The square root of 66061313 is about 8127.8110829423. The cubic root of 66061313 is about 404.2491050222.

Adding to 66061313 its reverse (31316066), we get a palindrome (97377379).

The spelling of 66061313 in words is "sixty-six million, sixty-one thousand, three hundred thirteen".