66005953 has 8 divisors (see below), whose sum is σ = 71165696. Its totient is φ = 60858000.

The previous prime is 66005923. The next prime is 66005959. The reversal of 66005953 is 35950066.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66005953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66005959) 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, 11248 + ... + 16078.

It is an arithmetic number, because the mean of its divisors is an integer number (8895712).

Almost surely, 2^66005953 is an apocalyptic number.

It is an amenable number.

66005953 is a deficient number, since it is larger than the sum of its proper divisors (5159743).

66005953 is a wasteful number, since it uses less digits than its factorization.

66005953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5895.

The product of its (nonzero) digits is 24300, while the sum is 34.

The square root of 66005953 is about 8124.4047781976. The cubic root of 66005953 is about 404.1361519504.

The spelling of 66005953 in words is "sixty-six million, five thousand, nine hundred fifty-three".