66052207165657 has 64 divisors (see below), whose sum is σ = 75397949673984. Its totient is φ = 57512581632000.

The previous prime is 66052207165639. The next prime is 66052207165661. The reversal of 66052207165657 is 75656170225066.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 66052207165657 - 2¹¹ = 66052207163609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66052207160657) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1682796282 + ... + 1682835532.

It is an arithmetic number, because the mean of its divisors is an integer number (1178092963656).

Almost surely, 2^{66052207165657} is an apocalyptic number.

It is an amenable number.

66052207165657 is a deficient number, since it is larger than the sum of its proper divisors (9345742508327).

66052207165657 is a wasteful number, since it uses less digits than its factorization.

66052207165657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40018.

The product of its (nonzero) digits is 31752000, while the sum is 58.

The spelling of 66052207165657 in words is "sixty-six trillion, fifty-two billion, two hundred seven million, one hundred sixty-five thousand, six hundred fifty-seven".