66967541091 has 192 divisors, whose sum is σ = 119890907136. Its totient is φ = 35533209600.

The previous prime is 66967541089. The next prime is 66967541107. The reversal of 66967541091 is 19014576966.

It is a happy number.

66967541091 is a `hidden beast` number, since 6 + 6 + 9 + 6 + 7 + 541 + 0 + 91 = 666.

It is not a de Polignac number, because 66967541091 - 2¹ = 66967541089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66967541041) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 218135160 + ... + 218135466.

It is an arithmetic number, because the mean of its divisors is an integer number (624431808).

Almost surely, 2^66967541091 is an apocalyptic number.

66967541091 is a deficient number, since it is larger than the sum of its proper divisors (52923366045).

66967541091 is a wasteful number, since it uses less digits than its factorization.

66967541091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 66967541091 in words is "sixty-six billion, nine hundred sixty-seven million, five hundred forty-one thousand, ninety-one".