66001325653505 has 16 divisors (see below), whose sum is σ = 87292474948224. Its totient is φ = 47506108807680.

The previous prime is 66001325653463. The next prime is 66001325653519. The reversal of 66001325653505 is 50535652310066.

It is not a de Polignac number, because 66001325653505 - 2²² = 66001321459201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66001325653505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6185685917 + ... + 6185696586.

It is an arithmetic number, because the mean of its divisors is an integer number (5455779684264).

Almost surely, 2^{66001325653505} is an apocalyptic number.

It is an amenable number.

66001325653505 is a deficient number, since it is larger than the sum of its proper divisors (21291149294719).

66001325653505 is a wasteful number, since it uses less digits than its factorization.

66001325653505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12371382616.

The product of its (nonzero) digits is 2430000, while the sum is 47.

The spelling of 66001325653505 in words is "sixty-six trillion, one billion, three hundred twenty-five million, six hundred fifty-three thousand, five hundred five".