66317377 has 16 divisors (see below), whose sum is σ = 78019200. Its totient is φ = 55186560.

The previous prime is 66317341. The next prime is 66317387. The reversal of 66317377 is 77371366.

It is a cyclic number.

It is not a de Polignac number, because 66317377 - 2¹¹ = 66315329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66317387) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76774 + ... + 77632.

It is an arithmetic number, because the mean of its divisors is an integer number (4876200).

Almost surely, 2^66317377 is an apocalyptic number.

It is an amenable number.

66317377 is a deficient number, since it is larger than the sum of its proper divisors (11701823).

66317377 is a wasteful number, since it uses less digits than its factorization.

66317377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1176.

The product of its digits is 111132, while the sum is 40.

The square root of 66317377 is about 8143.5481824571. The cubic root of 66317377 is about 404.7707425756.

The spelling of 66317377 in words is "sixty-six million, three hundred seventeen thousand, three hundred seventy-seven".