66634465 has 8 divisors (see below), whose sum is σ = 80165160. Its totient is φ = 53171712.

The previous prime is 66634459. The next prime is 66634481. The reversal of 66634465 is 56443666.

It can be written as a sum of positive squares in 4 ways, for example, as 1364224 + 65270241 = 1168^2 + 8079^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 66634465 - 2³ = 66634457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14800 + ... + 18769.

It is an arithmetic number, because the mean of its divisors is an integer number (10020645).

Almost surely, 2^66634465 is an apocalyptic number.

It is an amenable number.

66634465 is a deficient number, since it is larger than the sum of its proper divisors (13530695).

66634465 is a wasteful number, since it uses less digits than its factorization.

66634465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33971.

The product of its digits is 311040, while the sum is 40.

The square root of 66634465 is about 8162.9936297905. The cubic root of 66634465 is about 405.4148368434.

The spelling of 66634465 in words is "sixty-six million, six hundred thirty-four thousand, four hundred sixty-five".