66145316615007 has 16 divisors (see below), whose sum is σ = 101925367499520. Its totient is φ = 37372634747712.

The previous prime is 66145316614957. The next prime is 66145316615039. The reversal of 66145316615007 is 70051661354166.

66145316615007 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66145316615007 - 2⁷ = 66145316614879 is a prime.

It is a super-2 number, since 2×66145316615007² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66145316615087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17695374433 + ... + 17695378170.

It is an arithmetic number, because the mean of its divisors is an integer number (6370335468720).

Almost surely, 2^{66145316615007} is an apocalyptic number.

66145316615007 is a deficient number, since it is larger than the sum of its proper divisors (35780050884513).

66145316615007 is a wasteful number, since it uses less digits than its factorization.

66145316615007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35390752702.

The product of its (nonzero) digits is 2721600, while the sum is 51.

The spelling of 66145316615007 in words is "sixty-six trillion, one hundred forty-five billion, three hundred sixteen million, six hundred fifteen thousand, seven".