67776971 has 16 divisors (see below), whose sum is σ = 72900000. Its totient is φ = 62827776.

The previous prime is 67776953. The next prime is 67776991. The reversal of 67776971 is 17967776.

It is a cyclic number.

It is not a de Polignac number, because 67776971 - 2²² = 63582667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67776931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 251825 + ... + 252093.

It is an arithmetic number, because the mean of its divisors is an integer number (4556250).

Almost surely, 2^67776971 is an apocalyptic number.

67776971 is a deficient number, since it is larger than the sum of its proper divisors (5123029).

67776971 is a wasteful number, since it uses less digits than its factorization.

67776971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its digits is 777924, while the sum is 50.

The square root of 67776971 is about 8232.6770251237. The cubic root of 67776971 is about 407.7187824881.

The spelling of 67776971 in words is "sixty-seven million, seven hundred seventy-six thousand, nine hundred seventy-one".