66475473630720 has 1280 divisors, whose sum is σ = 273827411066880. Its totient is φ = 13351462502400.

The previous prime is 66475473630697. The next prime is 66475473630737. The reversal of 66475473630720 is 2703637457466.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 20587014066 + ... + 20587017294.

It is an arithmetic number, because the mean of its divisors is an integer number (213927664896).

Almost surely, 2^{66475473630720} is an apocalyptic number.

66475473630720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66475473630720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136913705533440).

66475473630720 is an abundant number, since it is smaller than the sum of its proper divisors (207351937436160).

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

66475473630720 is a wasteful number, since it uses less digits than its factorization.

66475473630720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427 (or 4411 counting only the distinct ones).

The product of its (nonzero) digits is 106686720, while the sum is 60.

The spelling of 66475473630720 in words is "sixty-six trillion, four hundred seventy-five billion, four hundred seventy-three million, six hundred thirty thousand, seven hundred twenty".