66065131 has 8 divisors (see below), whose sum is σ = 75204864. Its totient is φ = 57447720.

The previous prime is 66065107. The next prime is 66065173. The reversal of 66065131 is 13156066.

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

It is not a de Polignac number, because 66065131 - 2¹¹ = 66063083 is a prime.

It is a super-2 number, since 2×66065131² = 8729203068094322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66065131.

It is not an unprimeable number, because it can be changed into a prime (66065231) 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, 130311 + ... + 130816.

It is an arithmetic number, because the mean of its divisors is an integer number (9400608).

Almost surely, 2^66065131 is an apocalyptic number.

66065131 is a deficient number, since it is larger than the sum of its proper divisors (9139733).

66065131 is a wasteful number, since it uses less digits than its factorization.

66065131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261161.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 66065131 is about 8128.0459521339. The cubic root of 66065131 is about 404.2568927035.

The spelling of 66065131 in words is "sixty-six million, sixty-five thousand, one hundred thirty-one".