66332405 has 8 divisors (see below), whose sum is σ = 82166784. Its totient is φ = 51354000.

The previous prime is 66332377. The next prime is 66332407. The reversal of 66332405 is 50423366.

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

It is not a de Polignac number, because 66332405 - 2⁶ = 66332341 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 (66332407) 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, 213821 + ... + 214130.

It is an arithmetic number, because the mean of its divisors is an integer number (10270848).

Almost surely, 2^66332405 is an apocalyptic number.

It is an amenable number.

66332405 is a deficient number, since it is larger than the sum of its proper divisors (15834379).

66332405 is a wasteful number, since it uses less digits than its factorization.

66332405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427987.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 66332405 is about 8144.4708238166. The cubic root of 66332405 is about 404.8013149313.

The spelling of 66332405 in words is "sixty-six million, three hundred thirty-two thousand, four hundred five".