66406424 has 32 divisors (see below), whose sum is σ = 142579200. Its totient is φ = 28404000.

The previous prime is 66406411. The next prime is 66406427. The reversal of 66406424 is 42460466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66406427) 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, 41267 + ... + 42845.

It is an arithmetic number, because the mean of its divisors is an integer number (4455600).

Almost surely, 2^66406424 is an apocalyptic number.

It is an amenable number.

66406424 is an abundant number, since it is smaller than the sum of its proper divisors (76172776).

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

66406424 is a wasteful number, since it uses less digits than its factorization.

66406424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2339 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 66406424 is about 8149.0136826490. The cubic root of 66406424 is about 404.9518288488.

The spelling of 66406424 in words is "sixty-six million, four hundred six thousand, four hundred twenty-four".