67778901 has 12 divisors (see below), whose sum is σ = 97986720. Its totient is φ = 45147240.

The previous prime is 67778849. The next prime is 67778903. The reversal of 67778901 is 10987776.

It is a happy number.

It is not a de Polignac number, because 67778901 - 2⁷ = 67778773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67778903) 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 11 ways as a sum of consecutive naturals, for example, 11320 + ... + 16238.

It is an arithmetic number, because the mean of its divisors is an integer number (8165560).

Almost surely, 2^67778901 is an apocalyptic number.

It is an amenable number.

67778901 is a deficient number, since it is larger than the sum of its proper divisors (30207819).

67778901 is a wasteful number, since it uses less digits than its factorization.

67778901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6456 (or 6453 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 67778901 is about 8232.7942401107. The cubic root of 67778901 is about 407.7226524839.

The spelling of 67778901 in words is "sixty-seven million, seven hundred seventy-eight thousand, nine hundred one".