66453161165645 has 4 divisors (see below), whose sum is σ = 79743793398780. Its totient is φ = 53162528932512.

The previous prime is 66453161165623. The next prime is 66453161165707. The reversal of 66453161165645 is 54656116135466.

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

It can be written as a sum of positive squares in 2 ways, for example, as 33779739217156 + 32673421948489 = 5812034^2 + 5716067^2 .

It is a cyclic number.

It is not a de Polignac number, because 66453161165645 - 2⁶ = 66453161165581 is a prime.

It is a super-3 number, since 3×66453161165645³ (a number of 42 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6645316116560 + ... + 6645316116569.

It is an arithmetic number, because the mean of its divisors is an integer number (19935948349695).

Almost surely, 2^{66453161165645} is an apocalyptic number.

It is an amenable number.

66453161165645 is a deficient number, since it is larger than the sum of its proper divisors (13290632233135).

66453161165645 is a wasteful number, since it uses less digits than its factorization.

66453161165645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13290632233134.

The product of its digits is 46656000, while the sum is 59.

The spelling of 66453161165645 in words is "sixty-six trillion, four hundred fifty-three billion, one hundred sixty-one million, one hundred sixty-five thousand, six hundred forty-five".