66313511 has 8 divisors (see below), whose sum is σ = 72407424. Its totient is φ = 60230520.

The previous prime is 66313501. The next prime is 66313537. The reversal of 66313511 is 11531366.

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 66313511 - 2¹⁸ = 66051367 is a prime.

It is a super-2 number, since 2×66313511² = 8794963482294242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66313501) 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, 15020 + ... + 18926.

It is an arithmetic number, because the mean of its divisors is an integer number (9050928).

Almost surely, 2^66313511 is an apocalyptic number.

66313511 is a deficient number, since it is larger than the sum of its proper divisors (6093913).

66313511 is a wasteful number, since it uses less digits than its factorization.

66313511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5461.

The product of its digits is 1620, while the sum is 26.

The square root of 66313511 is about 8143.3108131767. The cubic root of 66313511 is about 404.7628769946.

Adding to 66313511 its reverse (11531366), we get a palindrome (77844877).

The spelling of 66313511 in words is "sixty-six million, three hundred thirteen thousand, five hundred eleven".