66641343120 has 120 divisors (see below), whose sum is σ = 244149676992. Its totient is φ = 16155475200.

The previous prime is 66641343059. The next prime is 66641343127. The reversal of 66641343120 is 2134314666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×66641343120² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (66641343127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4199236 + ... + 4215075.

Almost surely, 2^66641343120 is an apocalyptic number.

66641343120 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66641343120 is an abundant number, since it is smaller than the sum of its proper divisors (177508333872).

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

66641343120 is a wasteful number, since it uses less digits than its factorization.

66641343120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8414341 (or 8414332 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

Adding to 66641343120 its reverse (2134314666), we get a palindrome (68775657786).

The spelling of 66641343120 in words is "sixty-six billion, six hundred forty-one million, three hundred forty-three thousand, one hundred twenty".