166164435546554 has 32 divisors (see below), whose sum is σ = 266523644642112. Its totient is φ = 77420102560000.

The previous prime is 166164435546533. The next prime is 166164435546563. The reversal of 166164435546554 is 455645534461661.

It is a happy number.

It is a super-2 number, since 2×166164435546554² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 619672049 + ... + 619940139.

It is an arithmetic number, because the mean of its divisors is an integer number (8328863895066).

Almost surely, 2^{166164435546554} is an apocalyptic number.

166164435546554 is a deficient number, since it is larger than the sum of its proper divisors (100359209095558).

166164435546554 is a wasteful number, since it uses less digits than its factorization.

166164435546554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448702.

The product of its digits is 622080000, while the sum is 65.

The spelling of 166164435546554 in words is "one hundred sixty-six trillion, one hundred sixty-four billion, four hundred thirty-five million, five hundred forty-six thousand, five hundred fifty-four".