66405334 has 8 divisors (see below), whose sum is σ = 99649728. Its totient is φ = 33188760.

The previous prime is 66405319. The next prime is 66405337. The reversal of 66405334 is 43350466.

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

It is a junction number, because it is equal to n+sod(n) for n = 66405296 and 66405305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66405337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699 + ... + 11545.

It is an arithmetic number, because the mean of its divisors is an integer number (12456216).

Almost surely, 2^66405334 is an apocalyptic number.

66405334 is a deficient number, since it is larger than the sum of its proper divisors (33244394).

66405334 is a wasteful number, since it uses less digits than its factorization.

66405334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13910.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 66405334 is about 8148.9468031151. The cubic root of 66405334 is about 404.9496132001.

The spelling of 66405334 in words is "sixty-six million, four hundred five thousand, three hundred thirty-four".