67742520918840 has 96 divisors (see below), whose sum is σ = 220236122386800. Its totient is φ = 18058688294400.

The previous prime is 67742520918757. The next prime is 67742520918841. The reversal of 67742520918840 is 4881902524776.

It is a happy number.

67742520918840 is a `hidden beast` number, since 6 + 7 + 7 + 425 + 2 + 0 + 91 + 88 + 40 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67742520918841) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30078061 + ... + 32251740.

Almost surely, 2^{67742520918840} is an apocalyptic number.

67742520918840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67742520918840 is an abundant number, since it is smaller than the sum of its proper divisors (152493601467960).

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

67742520918840 is a wasteful number, since it uses less digits than its factorization.

67742520918840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62332837 (or 62332830 counting only the distinct ones).

The product of its (nonzero) digits is 54190080, while the sum is 63.

The spelling of 67742520918840 in words is "sixty-seven trillion, seven hundred forty-two billion, five hundred twenty million, nine hundred eighteen thousand, eight hundred forty".