66310140553021 has 8 divisors (see below), whose sum is σ = 66476066698944. Its totient is φ = 66144409044480.

The previous prime is 66310140552973. The next prime is 66310140553043. The reversal of 66310140553021 is 12035504101366.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66310140553021 is a prime.

It is a super-2 number, since 2×66310140553021² (a number of 28 digits) 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 (66310140559021) 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, 47977111 + ... + 49339876.

It is an arithmetic number, because the mean of its divisors is an integer number (8309508337368).

Almost surely, 2^{66310140553021} is an apocalyptic number.

It is an amenable number.

66310140553021 is a deficient number, since it is larger than the sum of its proper divisors (165926145923).

66310140553021 is a wasteful number, since it uses less digits than its factorization.

66310140553021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97318691.

The product of its (nonzero) digits is 64800, while the sum is 37.

Adding to 66310140553021 its reverse (12035504101366), we get a palindrome (78345644654387).

The spelling of 66310140553021 in words is "sixty-six trillion, three hundred ten billion, one hundred forty million, five hundred fifty-three thousand, twenty-one".