67202421642 has 48 divisors (see below), whose sum is σ = 158337051912. Its totient is φ = 20513295360.

The previous prime is 67202421641. The next prime is 67202421647. The reversal of 67202421642 is 24612420276.

67202421642 is a `hidden beast` number, since 6 + 7 + 2 + 0 + 2 + 4 + 2 + 1 + 642 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 64486031481 + 2716390161 = 253941^2 + 52119^2 .

It is a junction number, because it is equal to n+sod(n) for n = 67202421597 and 67202421606.

It is not an unprimeable number, because it can be changed into a prime (67202421641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2956459 + ... + 2979102.

Almost surely, 2^67202421642 is an apocalyptic number.

67202421642 is an abundant number, since it is smaller than the sum of its proper divisors (91134630270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67202421642 is a wasteful number, since it uses less digits than its factorization.

67202421642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5935623 (or 5935620 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 67202421642 in words is "sixty-seven billion, two hundred two million, four hundred twenty-one thousand, six hundred forty-two".