67066670369987 has 4 divisors (see below), whose sum is σ = 69230111349696. Its totient is φ = 64903229390280.

The previous prime is 67066670369981. The next prime is 67066670370067. The reversal of 67066670369987 is 78996307666076.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67066670369987 - 2²⁰ = 67066669321411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67066670369981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081720489808 + ... + 1081720489869.

It is an arithmetic number, because the mean of its divisors is an integer number (17307527837424).

Almost surely, 2^{67066670369987} is an apocalyptic number.

67066670369987 is a deficient number, since it is larger than the sum of its proper divisors (2163440979709).

67066670369987 is a wasteful number, since it uses less digits than its factorization.

67066670369987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163440979708.

The product of its (nonzero) digits is 5184974592, while the sum is 80.

The spelling of 67066670369987 in words is "sixty-seven trillion, sixty-six billion, six hundred seventy million, three hundred sixty-nine thousand, nine hundred eighty-seven".