66452981145 has 16 divisors (see below), whose sum is σ = 106359806592. Its totient is φ = 35429911040.

The previous prime is 66452981071. The next prime is 66452981167. The reversal of 66452981145 is 54118925466.

66452981145 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 66452981145 - 2⁸ = 66452980889 is a prime.

It is a super-2 number, since 2×66452981145² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682797 + ... + 774026.

It is an arithmetic number, because the mean of its divisors is an integer number (6647487912).

Almost surely, 2^66452981145 is an apocalyptic number.

It is an amenable number.

66452981145 is a deficient number, since it is larger than the sum of its proper divisors (39906825447).

66452981145 is a wasteful number, since it uses less digits than its factorization.

66452981145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459872.

The product of its digits is 2073600, while the sum is 51.

It can be divided in two parts, 6645 and 2981145, that added together give a triangular number (2987790 = T₂₄₄₄).

The spelling of 66452981145 in words is "sixty-six billion, four hundred fifty-two million, nine hundred eighty-one thousand, one hundred forty-five".