166620962697 has 32 divisors (see below), whose sum is σ = 259204313088. Its totient is φ = 93229496256.

The previous prime is 166620962681. The next prime is 166620962701. The reversal of 166620962697 is 796269026661.

166620962697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166620962697 - 2⁴ = 166620962681 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 166620962697.

It is not an unprimeable number, because it can be changed into a prime (166620962797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 411028 + ... + 708650.

It is an arithmetic number, because the mean of its divisors is an integer number (8100134784).

Almost surely, 2^166620962697 is an apocalyptic number.

It is an amenable number.

166620962697 is a deficient number, since it is larger than the sum of its proper divisors (92583350391).

166620962697 is a wasteful number, since it uses less digits than its factorization.

166620962697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298189.

The product of its (nonzero) digits is 17635968, while the sum is 60.

The spelling of 166620962697 in words is "one hundred sixty-six billion, six hundred twenty million, nine hundred sixty-two thousand, six hundred ninety-seven".