66042216410420 has 96 divisors (see below), whose sum is σ = 140665480139520. Its totient is φ = 26042511421440.

The previous prime is 66042216410407. The next prime is 66042216410459. The reversal of 66042216410420 is 2401461224066.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4337170847 + ... + 4337186073.

It is an arithmetic number, because the mean of its divisors is an integer number (1465265418120).

Almost surely, 2^{66042216410420} is an apocalyptic number.

It is an amenable number.

66042216410420 is an abundant number, since it is smaller than the sum of its proper divisors (74623263729100).

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

66042216410420 is a wasteful number, since it uses less digits than its factorization.

66042216410420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23913 (or 23911 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 38.

Adding to 66042216410420 its reverse (2401461224066), we get a palindrome (68443677634486).

The spelling of 66042216410420 in words is "sixty-six trillion, forty-two billion, two hundred sixteen million, four hundred ten thousand, four hundred twenty".