66700070061 has 16 divisors (see below), whose sum is σ = 94292280000. Its totient is φ = 41794368768.

The previous prime is 66700070029. The next prime is 66700070071. The reversal of 66700070061 is 16007000766.

It is not a de Polignac number, because 66700070061 - 2⁵ = 66700070029 is a prime.

It is a super-2 number, since 2×66700070061² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66700070071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 847186 + ... + 922563.

It is an arithmetic number, because the mean of its divisors is an integer number (5893267500).

Almost surely, 2^66700070061 is an apocalyptic number.

It is an amenable number.

66700070061 is a deficient number, since it is larger than the sum of its proper divisors (27592209939).

66700070061 is a wasteful number, since it uses less digits than its factorization.

66700070061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770508.

The product of its (nonzero) digits is 10584, while the sum is 33.

The spelling of 66700070061 in words is "sixty-six billion, seven hundred million, seventy thousand, sixty-one".