67771661379 has 16 divisors (see below), whose sum is σ = 95582671872. Its totient is φ = 42624698688.

The previous prime is 67771661371. The next prime is 67771661401. The reversal of 67771661379 is 97316617776.

It is not a de Polignac number, because 67771661379 - 2³ = 67771661371 is a prime.

It is a super-3 number, since 3×67771661379³ (a number of 33 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (67771661371) 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 15 ways as a sum of consecutive naturals, for example, 6722347 + ... + 6732420.

It is an arithmetic number, because the mean of its divisors is an integer number (5973916992).

Almost surely, 2^67771661379 is an apocalyptic number.

67771661379 is a gapful number since it is divisible by the number (69) formed by its first and last digit.

67771661379 is a deficient number, since it is larger than the sum of its proper divisors (27811010493).

67771661379 is a wasteful number, since it uses less digits than its factorization.

67771661379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13454866.

The product of its digits is 14002632, while the sum is 60.

The spelling of 67771661379 in words is "sixty-seven billion, seven hundred seventy-one million, six hundred sixty-one thousand, three hundred seventy-nine".