66406334 has 4 divisors (see below), whose sum is σ = 99609504. Its totient is φ = 33203166.

The previous prime is 66406331. The next prime is 66406339. The reversal of 66406334 is 43360466.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66406334.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66406331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16601582 + ... + 16601585.

It is an arithmetic number, because the mean of its divisors is an integer number (24902376).

Almost surely, 2^66406334 is an apocalyptic number.

66406334 is a deficient number, since it is larger than the sum of its proper divisors (33203170).

66406334 is a wasteful number, since it uses less digits than its factorization.

66406334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33203169.

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 66406334 is about 8149.0081605064. The cubic root of 66406334 is about 404.9516459062.

The spelling of 66406334 in words is "sixty-six million, four hundred six thousand, three hundred thirty-four".