66206500111020 has 48 divisors (see below), whose sum is σ = 185379889494240. Its totient is φ = 17654905821696.

The previous prime is 66206500110979. The next prime is 66206500111091. The reversal of 66206500111020 is 2011100560266.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1686294 + ... + 11629986.

It is an arithmetic number, because the mean of its divisors is an integer number (3862081031130).

Almost surely, 2^{66206500111020} is an apocalyptic number.

66206500111020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66206500111020 is an abundant number, since it is smaller than the sum of its proper divisors (119173389383220).

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

66206500111020 is a wasteful number, since it uses less digits than its factorization.

66206500111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10054674 (or 10054672 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 66206500111020 its reverse (2011100560266), we get a palindrome (68217600671286).

The spelling of 66206500111020 in words is "sixty-six trillion, two hundred six billion, five hundred million, one hundred eleven thousand, twenty".