66288137 has 4 divisors (see below), whose sum is σ = 68426496. Its totient is φ = 64149780.

The previous prime is 66288121. The next prime is 66288191. The reversal of 66288137 is 73188266.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66288137 - 2⁴ = 66288121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66288094 and 66288103.

It is not an unprimeable number, because it can be changed into a prime (66288197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1069133 + ... + 1069194.

It is an arithmetic number, because the mean of its divisors is an integer number (17106624).

Almost surely, 2^66288137 is an apocalyptic number.

It is an amenable number.

66288137 is a deficient number, since it is larger than the sum of its proper divisors (2138359).

66288137 is a wasteful number, since it uses less digits than its factorization.

66288137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2138358.

The product of its digits is 96768, while the sum is 41.

The square root of 66288137 is about 8141.7526982831. The cubic root of 66288137 is about 404.7112446635.

The spelling of 66288137 in words is "sixty-six million, two hundred eighty-eight thousand, one hundred thirty-seven".