166021564202986 has 8 divisors (see below), whose sum is σ = 249951284852544. Its totient is φ = 82704469252140.

The previous prime is 166021564202983. The next prime is 166021564203017. The reversal of 166021564202986 is 689202465120661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×166021564202986² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 166021564202986.

It is not an unprimeable number, because it can be changed into a prime (166021564202983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153156424000 + ... + 153156425083.

It is an arithmetic number, because the mean of its divisors is an integer number (31243910606568).

Almost surely, 2^{166021564202986} is an apocalyptic number.

166021564202986 is a deficient number, since it is larger than the sum of its proper divisors (83929720649558).

166021564202986 is a wasteful number, since it uses less digits than its factorization.

166021564202986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306312849356.

The product of its (nonzero) digits is 14929920, while the sum is 58.

The spelling of 166021564202986 in words is "one hundred sixty-six trillion, twenty-one billion, five hundred sixty-four million, two hundred two thousand, nine hundred eighty-six".