67338642987 has 48 divisors (see below), whose sum is σ = 121448890368. Its totient is φ = 34928893440.

The previous prime is 67338642983. The next prime is 67338642989. The reversal of 67338642987 is 78924683376.

67338642987 is a `hidden beast` number, since 6 + 7 + 338 + 6 + 4 + 298 + 7 = 666.

It is not a de Polignac number, because 67338642987 - 2² = 67338642983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (67338642983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 394198 + ... + 538580.

It is an arithmetic number, because the mean of its divisors is an integer number (2530185216).

Almost surely, 2^67338642987 is an apocalyptic number.

67338642987 is a deficient number, since it is larger than the sum of its proper divisors (54110247381).

67338642987 is a wasteful number, since it uses less digits than its factorization.

67338642987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145080 (or 145077 counting only the distinct ones).

The product of its digits is 73156608, while the sum is 63.

The spelling of 67338642987 in words is "sixty-seven billion, three hundred thirty-eight million, six hundred forty-two thousand, nine hundred eighty-seven".