66516151505363 has 4 divisors (see below), whose sum is σ = 76018458863280. Its totient is φ = 57013844147448.

The previous prime is 66516151505299. The next prime is 66516151505369. The reversal of 66516151505363 is 36350515161566.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66516151505363 - 2⁶ = 66516151505299 is a prime.

It is a super-2 number, since 2×66516151505363² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66516151505369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4751153678948 + ... + 4751153678961.

It is an arithmetic number, because the mean of its divisors is an integer number (19004614715820).

Almost surely, 2^{66516151505363} is an apocalyptic number.

66516151505363 is a deficient number, since it is larger than the sum of its proper divisors (9502307357917).

66516151505363 is an equidigital number, since it uses as much as digits as its factorization.

66516151505363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9502307357916.

The product of its (nonzero) digits is 7290000, while the sum is 53.

The spelling of 66516151505363 in words is "sixty-six trillion, five hundred sixteen billion, one hundred fifty-one million, five hundred five thousand, three hundred sixty-three".