67066666602221 has 16 divisors (see below), whose sum is σ = 78796116463680. Its totient is φ = 56276500120320.

The previous prime is 67066666602217. The next prime is 67066666602239. The reversal of 67066666602221 is 12220666666076.

It is a cyclic number.

It is not a de Polignac number, because 67066666602221 - 2² = 67066666602217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67066666602211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10907435 + ... + 15909288.

It is an arithmetic number, because the mean of its divisors is an integer number (4924757278980).

Almost surely, 2^{67066666602221} is an apocalyptic number.

It is an amenable number.

67066666602221 is a deficient number, since it is larger than the sum of its proper divisors (11729449861459).

67066666602221 is a wasteful number, since it uses less digits than its factorization.

67066666602221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26834236.

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 67066666602221 in words is "sixty-seven trillion, sixty-six billion, six hundred sixty-six million, six hundred two thousand, two hundred twenty-one".