66307050720 has 144 divisors (see below), whose sum is σ = 233572090752. Its totient is φ = 17111485440.

The previous prime is 66307050713. The next prime is 66307050721. The reversal of 66307050720 is 2705070366.

It is a happy number.

66307050720 is a `hidden beast` number, since 6 + 63 + 0 + 70 + 507 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66307050721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 698047 + ... + 787326.

It is an arithmetic number, because the mean of its divisors is an integer number (1622028408).

Almost surely, 2^66307050720 is an apocalyptic number.

66307050720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66307050720 is an abundant number, since it is smaller than the sum of its proper divisors (167265040032).

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

66307050720 is a wasteful number, since it uses less digits than its factorization.

66307050720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1485425 (or 1485414 counting only the distinct ones).

The product of its (nonzero) digits is 52920, while the sum is 36.

The spelling of 66307050720 in words is "sixty-six billion, three hundred seven million, fifty thousand, seven hundred twenty".