66126120513 has 8 divisors (see below), whose sum is σ = 88195648800. Its totient is φ = 44070336288.

The previous prime is 66126120509. The next prime is 66126120547. The reversal of 66126120513 is 31502162166.

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

It is not a de Polignac number, because 66126120513 - 2² = 66126120509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66126140513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3424783 + ... + 3444036.

It is an arithmetic number, because the mean of its divisors is an integer number (11024456100).

Almost surely, 2^66126120513 is an apocalyptic number.

It is an amenable number.

66126120513 is a deficient number, since it is larger than the sum of its proper divisors (22069528287).

66126120513 is a wasteful number, since it uses less digits than its factorization.

66126120513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6872031.

The product of its (nonzero) digits is 12960, while the sum is 33.

Adding to 66126120513 its reverse (31502162166), we get a palindrome (97628282679).

The spelling of 66126120513 in words is "sixty-six billion, one hundred twenty-six million, one hundred twenty thousand, five hundred thirteen".