201566775207 has 16 divisors (see below), whose sum is σ = 307201911552. Its totient is φ = 115161312000.

The previous prime is 201566775191. The next prime is 201566775211. The reversal of 201566775207 is 702577665102.

It is not a de Polignac number, because 201566775207 - 2⁴ = 201566775191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201566775257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 694794 + ... + 941207.

It is an arithmetic number, because the mean of its divisors is an integer number (19200119472).

Almost surely, 2^201566775207 is an apocalyptic number.

201566775207 is a deficient number, since it is larger than the sum of its proper divisors (105635136345).

201566775207 is a wasteful number, since it uses less digits than its factorization.

201566775207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641878.

The product of its (nonzero) digits is 1234800, while the sum is 48.

The spelling of 201566775207 in words is "two hundred one billion, five hundred sixty-six million, seven hundred seventy-five thousand, two hundred seven".