66968964241919 has 8 divisors (see below), whose sum is σ = 68146045121040. Its totient is φ = 65793283819200.

The previous prime is 66968964241901. The next prime is 66968964241951. The reversal of 66968964241919 is 91914246986966.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66968964241919 - 2¹⁶ = 66968964176383 is a prime.

It is a super-2 number, since 2×66968964241919² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66968964241219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350017622 + ... + 350208899.

It is an arithmetic number, because the mean of its divisors is an integer number (8518255640130).

Almost surely, 2^{66968964241919} is an apocalyptic number.

66968964241919 is a deficient number, since it is larger than the sum of its proper divisors (1177080879121).

66968964241919 is a wasteful number, since it uses less digits than its factorization.

66968964241919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700228201.

The product of its digits is 2176782336, while the sum is 80.

The spelling of 66968964241919 in words is "sixty-six trillion, nine hundred sixty-eight billion, nine hundred sixty-four million, two hundred forty-one thousand, nine hundred nineteen".