66067423920 has 120 divisors (see below), whose sum is σ = 223950304656. Its totient is φ = 17453305344.

The previous prime is 66067423907. The next prime is 66067423963. The reversal of 66067423920 is 2932476066.

66067423920 is a `hidden beast` number, since 6 + 606 + 7 + 4 + 2 + 39 + 2 + 0 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 351747 + ... + 505826.

Almost surely, 2^66067423920 is an apocalyptic number.

66067423920 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66067423920 is an abundant number, since it is smaller than the sum of its proper divisors (157882880736).

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

66067423920 is a wasteful number, since it uses less digits than its factorization.

66067423920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 857699 (or 857690 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

Adding to 66067423920 its reverse (2932476066), we get a palindrome (68999899986).

The spelling of 66067423920 in words is "sixty-six billion, sixty-seven million, four hundred twenty-three thousand, nine hundred twenty".