66201725140985 has 32 divisors (see below), whose sum is σ = 94760158348800. Its totient is φ = 43411766035968.

The previous prime is 66201725140913. The next prime is 66201725141033. The reversal of 66201725140985 is 58904152710266.

It is a cyclic number.

It is not a de Polignac number, because 66201725140985 - 2²² = 66201720946681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66201725140985.

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, 5953892 + ... + 12955781.

It is an arithmetic number, because the mean of its divisors is an integer number (2961254948400).

Almost surely, 2^{66201725140985} is an apocalyptic number.

It is an amenable number.

66201725140985 is a deficient number, since it is larger than the sum of its proper divisors (28558433207815).

66201725140985 is a wasteful number, since it uses less digits than its factorization.

66201725140985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18914057.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 66201725140985 in words is "sixty-six trillion, two hundred one billion, seven hundred twenty-five million, one hundred forty thousand, nine hundred eighty-five".