67615420020 has 48 divisors (see below), whose sum is σ = 190274582400. Its totient is φ = 17940168576.

The previous prime is 67615420009. The next prime is 67615420027. The reversal of 67615420020 is 2002451676.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67615420027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2819527 + ... + 2843406.

It is an arithmetic number, because the mean of its divisors is an integer number (3964053800).

Almost surely, 2^67615420020 is an apocalyptic number.

67615420020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

67615420020 is an abundant number, since it is smaller than the sum of its proper divisors (122659162380).

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

67615420020 is a wasteful number, since it uses less digits than its factorization.

67615420020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5663144 (or 5663142 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 33.

Adding to 67615420020 its reverse (2002451676), we get a palindrome (69617871696).

The spelling of 67615420020 in words is "sixty-seven billion, six hundred fifteen million, four hundred twenty thousand, twenty".