67720610072020 has 12 divisors (see below), whose sum is σ = 142213281151284. Its totient is φ = 27088244028800.

The previous prime is 67720610071969. The next prime is 67720610072081. The reversal of 67720610072020 is 2027001602776.

It can be written as a sum of positive squares in 2 ways, for example, as 24679295166276 + 43041314905744 = 4967826^2 + 6560588^2 .

It is a super-4 number, since 4×67720610072020⁴ (a number of 56 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1693015251781 + ... + 1693015251820.

It is an arithmetic number, because the mean of its divisors is an integer number (11851106762607).

Almost surely, 2^{67720610072020} is an apocalyptic number.

It is an amenable number.

67720610072020 is an abundant number, since it is smaller than the sum of its proper divisors (74492671079264).

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

67720610072020 is a wasteful number, since it uses less digits than its factorization.

67720610072020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3386030503610 (or 3386030503608 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 40.

Adding to 67720610072020 its reverse (2027001602776), we get a palindrome (69747611674796).

The spelling of 67720610072020 in words is "sixty-seven trillion, seven hundred twenty billion, six hundred ten million, seventy-two thousand, twenty".