66757455373 has 4 divisors (see below), whose sum is σ = 76294234720. Its totient is φ = 57220676028.

The previous prime is 66757455367. The next prime is 66757455389. The reversal of 66757455373 is 37355475766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 66757455373 - 2¹⁷ = 66757324301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66757455473) 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, 4768389663 + ... + 4768389676.

It is an arithmetic number, because the mean of its divisors is an integer number (19073558680).

Almost surely, 2^66757455373 is an apocalyptic number.

It is an amenable number.

66757455373 is a deficient number, since it is larger than the sum of its proper divisors (9536779347).

66757455373 is an equidigital number, since it uses as much as digits as its factorization.

66757455373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9536779346.

The product of its digits is 55566000, while the sum is 58.

The spelling of 66757455373 in words is "sixty-six billion, seven hundred fifty-seven million, four hundred fifty-five thousand, three hundred seventy-three".