66274650320 has 40 divisors (see below), whose sum is σ = 154100197224. Its totient is φ = 26507858432.

The previous prime is 66274650317. The next prime is 66274650341. The reversal of 66274650320 is 2305647266.

It can be written as a sum of positive squares in 4 ways, for example, as 10901030464 + 55373619856 = 104408^2 + 235316^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×66274650320² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 1501202 + ... + 1544718.

Almost surely, 2^66274650320 is an apocalyptic number.

It is an amenable number.

66274650320 is an abundant number, since it is smaller than the sum of its proper divisors (87825546904).

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

66274650320 is a wasteful number, since it uses less digits than its factorization.

66274650320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62567 (or 62561 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 41.

The spelling of 66274650320 in words is "sixty-six billion, two hundred seventy-four million, six hundred fifty thousand, three hundred twenty".