66146642745 has 64 divisors (see below), whose sum is σ = 114423528960. Its totient is φ = 32510066688.

The previous prime is 66146642741. The next prime is 66146642753. The reversal of 66146642745 is 54724664166.

It is not a de Polignac number, because 66146642745 - 2² = 66146642741 is a prime.

It is a super-2 number, since 2×66146642745² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (66146642741) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2323437 + ... + 2351733.

It is an arithmetic number, because the mean of its divisors is an integer number (1787867640).

Almost surely, 2^66146642745 is an apocalyptic number.

It is an amenable number.

66146642745 is a deficient number, since it is larger than the sum of its proper divisors (48276886215).

66146642745 is a wasteful number, since it uses less digits than its factorization.

66146642745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28514.

The product of its digits is 5806080, while the sum is 51.

The spelling of 66146642745 in words is "sixty-six billion, one hundred forty-six million, six hundred forty-two thousand, seven hundred forty-five".