66377704422455 has 32 divisors (see below), whose sum is σ = 82448332574400. Its totient is φ = 51240933015552.

The previous prime is 66377704422451. The next prime is 66377704422461. The reversal of 66377704422455 is 55422440777366.

It is a cyclic number.

It is not a de Polignac number, because 66377704422455 - 2² = 66377704422451 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66377704422451) 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, 2122237277 + ... + 2122268553.

It is an arithmetic number, because the mean of its divisors is an integer number (2576510392950).

Almost surely, 2^{66377704422455} is an apocalyptic number.

66377704422455 is a deficient number, since it is larger than the sum of its proper divisors (16070628151945).

66377704422455 is a wasteful number, since it uses less digits than its factorization.

66377704422455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39443.

The product of its (nonzero) digits is 237081600, while the sum is 62.

The spelling of 66377704422455 in words is "sixty-six trillion, three hundred seventy-seven billion, seven hundred four million, four hundred twenty-two thousand, four hundred fifty-five".