66755202202651 has 4 divisors (see below), whose sum is σ = 66764526864400. Its totient is φ = 66745877540904.

The previous prime is 66755202202553. The next prime is 66755202202681. The reversal of 66755202202651 is 15620220255766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66755202202651 - 2²⁵ = 66755168648219 is a prime.

It is a super-2 number, since 2×66755202202651² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 66755202202595 and 66755202202604.

It is not an unprimeable number, because it can be changed into a prime (66755202202681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4662320136 + ... + 4662334453.

It is an arithmetic number, because the mean of its divisors is an integer number (16691131716100).

Almost surely, 2^{66755202202651} is an apocalyptic number.

66755202202651 is a deficient number, since it is larger than the sum of its proper divisors (9324661749).

66755202202651 is an equidigital number, since it uses as much as digits as its factorization.

66755202202651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9324661748.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 66755202202651 in words is "sixty-six trillion, seven hundred fifty-five billion, two hundred two million, two hundred two thousand, six hundred fifty-one".