66041200531251 has 48 divisors (see below), whose sum is σ = 108638384355072. Its totient is φ = 38267513380800.

The previous prime is 66041200531223. The next prime is 66041200531357. The reversal of 66041200531251 is 15213500214066.

66041200531251 is a `hidden beast` number, since 6 + 60 + 4 + 12 + 0 + 0 + 531 + 2 + 51 = 666.

It is not a de Polignac number, because 66041200531251 - 2¹¹ = 66041200529203 is a prime.

It is a super-2 number, since 2×66041200531251² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66041200538251) 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, 1472185 + ... + 11586618.

It is an arithmetic number, because the mean of its divisors is an integer number (2263299674064).

Almost surely, 2^{66041200531251} is an apocalyptic number.

66041200531251 is a deficient number, since it is larger than the sum of its proper divisors (42597183823821).

66041200531251 is a wasteful number, since it uses less digits than its factorization.

66041200531251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13061064 (or 13061061 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 66041200531251 in words is "sixty-six trillion, forty-one billion, two hundred million, five hundred thirty-one thousand, two hundred fifty-one".