67667478109 has 12 divisors (see below), whose sum is σ = 85871160288. Its totient is φ = 52727904600.

The previous prime is 67667478101. The next prime is 67667478133. The reversal of 67667478109 is 90187476676.

It is not a de Polignac number, because 67667478109 - 2³ = 67667478101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67667478101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62770777 + ... + 62771854.

It is an arithmetic number, because the mean of its divisors is an integer number (7155930024).

Almost surely, 2^67667478109 is an apocalyptic number.

It is an amenable number.

67667478109 is a deficient number, since it is larger than the sum of its proper divisors (18203682179).

67667478109 is a wasteful number, since it uses less digits than its factorization.

67667478109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125542656 (or 125542649 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 61.

The spelling of 67667478109 in words is "sixty-seven billion, six hundred sixty-seven million, four hundred seventy-eight thousand, one hundred nine".