66001705 has 32 divisors (see below), whose sum is σ = 99283968. Its totient is φ = 40920000.

The previous prime is 66001699. The next prime is 66001711. The reversal of 66001705 is 50710066.

It is an interprime number because it is at equal distance from previous prime (66001699) and next prime (66001711).

It is not a de Polignac number, because 66001705 - 2¹⁹ = 65477417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66001705.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96294 + ... + 96976.

It is an arithmetic number, because the mean of its divisors is an integer number (3102624).

Almost surely, 2^66001705 is an apocalyptic number.

It is an amenable number.

66001705 is a deficient number, since it is larger than the sum of its proper divisors (33282263).

66001705 is a wasteful number, since it uses less digits than its factorization.

66001705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 957.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 66001705 is about 8124.1433394543. The cubic root of 66001705 is about 404.1274819889.

The spelling of 66001705 in words is "sixty-six million, one thousand, seven hundred five".