68533166377 has 4 divisors (see below), whose sum is σ = 73804948420. Its totient is φ = 63261384336.

The previous prime is 68533166323. The next prime is 68533166441. The reversal of 68533166377 is 77366133586.

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

It can be written as a sum of positive squares in 2 ways, for example, as 22867185961 + 45665980416 = 151219^2 + 213696^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68533166377 is a prime.

It is a super-2 number, since 2×68533166377² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68533161377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2635891002 + ... + 2635891027.

It is an arithmetic number, because the mean of its divisors is an integer number (18451237105).

Almost surely, 2^68533166377 is an apocalyptic number.

It is an amenable number.

68533166377 is a deficient number, since it is larger than the sum of its proper divisors (5271782043).

68533166377 is a wasteful number, since it uses less digits than its factorization.

68533166377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271782042.

The product of its digits is 11430720, while the sum is 55.

The spelling of 68533166377 in words is "sixty-eight billion, five hundred thirty-three million, one hundred sixty-six thousand, three hundred seventy-seven".