66105630621012 has 48 divisors (see below), whose sum is σ = 159227296445952. Its totient is φ = 21323709603840.

The previous prime is 66105630621007. The next prime is 66105630621013. The reversal of 66105630621012 is 21012603650166.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66105630621013) 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, 8755348 + ... + 14452244.

It is an arithmetic number, because the mean of its divisors is an integer number (3317235342624).

Almost surely, 2^{66105630621012} is an apocalyptic number.

66105630621012 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66105630621012 is an abundant number, since it is smaller than the sum of its proper divisors (93121665824940).

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

66105630621012 is a wasteful number, since it uses less digits than its factorization.

66105630621012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5728128 (or 5728126 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The spelling of 66105630621012 in words is "sixty-six trillion, one hundred five billion, six hundred thirty million, six hundred twenty-one thousand, twelve".