66325755139085 has 32 divisors (see below), whose sum is σ = 87787794124800. Its totient is φ = 47799556570368.

The previous prime is 66325755139081. The next prime is 66325755139099. The reversal of 66325755139085 is 58093155752366.

It is a cyclic number.

It is not a de Polignac number, because 66325755139085 - 2² = 66325755139081 is a prime.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66325755139081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30037757 + ... + 32170146.

It is an arithmetic number, because the mean of its divisors is an integer number (2743368566400).

Almost surely, 2^{66325755139085} is an apocalyptic number.

66325755139085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66325755139085 is a deficient number, since it is larger than the sum of its proper divisors (21462038985715).

66325755139085 is a wasteful number, since it uses less digits than its factorization.

66325755139085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62208317.

The product of its (nonzero) digits is 204120000, while the sum is 65.

The spelling of 66325755139085 in words is "sixty-six trillion, three hundred twenty-five billion, seven hundred fifty-five million, one hundred thirty-nine thousand, eighty-five".