66722360045616 has 160 divisors (see below), whose sum is σ = 209918788266240. Its totient is φ = 20123072524800.

The previous prime is 66722360045591. The next prime is 66722360045629. The reversal of 66722360045616 is 61654006322766.

66722360045616 is a `hidden beast` number, since 6 + 6 + 7 + 2 + 23 + 600 + 4 + 5 + 6 + 1 + 6 = 666.

It is a super-3 number, since 3×66722360045616³ (a number of 42 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 32269605 + ... + 34274948.

It is an arithmetic number, because the mean of its divisors is an integer number (1311992426664).

Almost surely, 2^{66722360045616} is an apocalyptic number.

66722360045616 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

66722360045616 is an abundant number, since it is smaller than the sum of its proper divisors (143196428220624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66722360045616 is a wasteful number, since it uses less digits than its factorization.

66722360045616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66544792 (or 66544780 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 54.

The spelling of 66722360045616 in words is "sixty-six trillion, seven hundred twenty-two billion, three hundred sixty million, forty-five thousand, six hundred sixteen".