66451422610 has 16 divisors (see below), whose sum is σ = 119702722176. Its totient is φ = 26560533168.

The previous prime is 66451422593. The next prime is 66451422617. The reversal of 66451422610 is 1622415466.

It is a self number, because there is not a number n which added to its sum of digits gives 66451422610.

It is not an unprimeable number, because it can be changed into a prime (66451422617) 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 7 ways as a sum of consecutive naturals, for example, 2490552 + ... + 2517091.

It is an arithmetic number, because the mean of its divisors is an integer number (7481420136).

Almost surely, 2^66451422610 is an apocalyptic number.

66451422610 is a deficient number, since it is larger than the sum of its proper divisors (53251299566).

66451422610 is a wasteful number, since it uses less digits than its factorization.

66451422610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5008977.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 66451422610 in words is "sixty-six billion, four hundred fifty-one million, four hundred twenty-two thousand, six hundred ten".