66432487421 has 8 divisors (see below), whose sum is σ = 69246290400. Its totient is φ = 63672280848.

The previous prime is 66432487399. The next prime is 66432487423. The reversal of 66432487421 is 12478423466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66432487421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66432487423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13396571 + ... + 13401528.

It is an arithmetic number, because the mean of its divisors is an integer number (8655786300).

Almost surely, 2^66432487421 is an apocalyptic number.

It is an amenable number.

66432487421 is a deficient number, since it is larger than the sum of its proper divisors (2813802979).

66432487421 is a wasteful number, since it uses less digits than its factorization.

66432487421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26798203.

The product of its digits is 1548288, while the sum is 47.

The spelling of 66432487421 in words is "sixty-six billion, four hundred thirty-two million, four hundred eighty-seven thousand, four hundred twenty-one".