66531105663150 has 96 divisors (see below), whose sum is σ = 170689558026240. Its totient is φ = 17129560936320.

The previous prime is 66531105663131. The next prime is 66531105663157. The reversal of 66531105663150 is 5136650113566.

It is a super-3 number, since 3×66531105663150³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 66531105663150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66531105663157) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 411807687 + ... + 411969213.

It is an arithmetic number, because the mean of its divisors is an integer number (1778016229440).

Almost surely, 2^{66531105663150} is an apocalyptic number.

66531105663150 is an abundant number, since it is smaller than the sum of its proper divisors (104158452363090).

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

66531105663150 is a wasteful number, since it uses less digits than its factorization.

66531105663150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256258 (or 256253 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 48.

The spelling of 66531105663150 in words is "sixty-six trillion, five hundred thirty-one billion, one hundred five million, six hundred sixty-three thousand, one hundred fifty".