166640514342406 has 16 divisors (see below), whose sum is σ = 269189674299504. Its totient is φ = 76910677725024.

The previous prime is 166640514342397. The next prime is 166640514342427. The reversal of 166640514342406 is 604243415046661.

It is a super-2 number, since 2×166640514342406² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7453200 + ... + 19718803.

It is an arithmetic number, because the mean of its divisors is an integer number (16824354643719).

Almost surely, 2^{166640514342406} is an apocalyptic number.

166640514342406 is a deficient number, since it is larger than the sum of its proper divisors (102549159957098).

166640514342406 is a wasteful number, since it uses less digits than its factorization.

166640514342406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27407895.

The product of its (nonzero) digits is 9953280, while the sum is 52.

The spelling of 166640514342406 in words is "one hundred sixty-six trillion, six hundred forty billion, five hundred fourteen million, three hundred forty-two thousand, four hundred six".