67780395 has 60 divisors (see below), whose sum is σ = 126469200. Its totient is φ = 34727616.

The previous prime is 67780387. The next prime is 67780397. The reversal of 67780395 is 59308776.

It is a happy number.

It is not a de Polignac number, because 67780395 - 2³ = 67780387 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 67780395.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67780397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 340506 + ... + 340704.

It is an arithmetic number, because the mean of its divisors is an integer number (2107820).

Almost surely, 2^67780395 is an apocalyptic number.

67780395 is a deficient number, since it is larger than the sum of its proper divisors (58688805).

67780395 is a wasteful number, since it uses less digits than its factorization.

67780395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 45.

The square root of 67780395 is about 8232.8849742967. The cubic root of 67780395 is about 407.7256481711.

The spelling of 67780395 in words is "sixty-seven million, seven hundred eighty thousand, three hundred ninety-five".