67478207149 has 4 divisors (see below), whose sum is σ = 67479651036. Its totient is φ = 67476763264.

The previous prime is 67478207131. The next prime is 67478207179. The reversal of 67478207149 is 94170287476.

It is a happy number.

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 23197422249 + 44280784900 = 152307^2 + 210430^2 .

It is a cyclic number.

It is not a de Polignac number, because 67478207149 - 2⁷ = 67478207021 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67478207149.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67478207179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649414 + ... + 746119.

It is an arithmetic number, because the mean of its divisors is an integer number (16869912759).

Almost surely, 2^67478207149 is an apocalyptic number.

It is an amenable number.

67478207149 is a deficient number, since it is larger than the sum of its proper divisors (1443887).

67478207149 is a wasteful number, since it uses less digits than its factorization.

67478207149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1443886.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The spelling of 67478207149 in words is "sixty-seven billion, four hundred seventy-eight million, two hundred seven thousand, one hundred forty-nine".