66501865753 has 8 divisors (see below), whose sum is σ = 67700037600. Its totient is φ = 65306061408.

The previous prime is 66501865733. The next prime is 66501865783. The reversal of 66501865753 is 35756810566.

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 66501865753 - 2²⁵ = 66468311321 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 66501865753.

It is not an unprimeable number, because it can be changed into a prime (66501865733) 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, 535143 + ... + 647596.

It is an arithmetic number, because the mean of its divisors is an integer number (8462504700).

Almost surely, 2^66501865753 is an apocalyptic number.

It is an amenable number.

66501865753 is a deficient number, since it is larger than the sum of its proper divisors (1198171847).

66501865753 is a wasteful number, since it uses less digits than its factorization.

66501865753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183751.

The product of its (nonzero) digits is 4536000, while the sum is 52.

The spelling of 66501865753 in words is "sixty-six billion, five hundred one million, eight hundred sixty-five thousand, seven hundred fifty-three".