66451313044912 has 40 divisors (see below), whose sum is σ = 130673469219840. Its totient is φ = 32731026219840.

The previous prime is 66451313044903. The next prime is 66451313044969. The reversal of 66451313044912 is 21944031315466.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58776664 + ... + 59896567.

It is an arithmetic number, because the mean of its divisors is an integer number (3266836730496).

Almost surely, 2^{66451313044912} is an apocalyptic number.

It is an amenable number.

66451313044912 is a deficient number, since it is larger than the sum of its proper divisors (64222156174928).

66451313044912 is a wasteful number, since it uses less digits than its factorization.

66451313044912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118673761 (or 118673755 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 49.

The spelling of 66451313044912 in words is "sixty-six trillion, four hundred fifty-one billion, three hundred thirteen million, forty-four thousand, nine hundred twelve".