66377567236477 has 4 divisors (see below), whose sum is σ = 75860076841696. Its totient is φ = 56895057631260.

The previous prime is 66377567236471. The next prime is 66377567236481. The reversal of 66377567236477 is 77463276577366.

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 66377567236477 - 2¹⁹ = 66377566712189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66377567236471) 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, 4741254802599 + ... + 4741254802612.

It is an arithmetic number, because the mean of its divisors is an integer number (18965019210424).

Almost surely, 2^{66377567236477} is an apocalyptic number.

It is an amenable number.

66377567236477 is a deficient number, since it is larger than the sum of its proper divisors (9482509605219).

66377567236477 is an equidigital number, since it uses as much as digits as its factorization.

66377567236477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9482509605218.

The product of its digits is 7841473920, while the sum is 76.

The spelling of 66377567236477 in words is "sixty-six trillion, three hundred seventy-seven billion, five hundred sixty-seven million, two hundred thirty-six thousand, four hundred seventy-seven".