166401155346656 has 24 divisors (see below), whose sum is σ = 327602578885344. Its totient is φ = 83200500391680.

The previous prime is 166401155346593. The next prime is 166401155346719. The reversal of 166401155346656 is 656643551104661.

It is an interprime number because it is at equal distance from previous prime (166401155346593) and next prime (166401155346719).

It is a junction number, because it is equal to n+sod(n) for n = 166401155346595 and 166401155346604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50228156 + ... + 53438468.

It is an arithmetic number, because the mean of its divisors is an integer number (13650107453556).

Almost surely, 2^{166401155346656} is an apocalyptic number.

166401155346656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

166401155346656 is a deficient number, since it is larger than the sum of its proper divisors (161201423538688).

166401155346656 is a wasteful number, since it uses less digits than its factorization.

166401155346656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830114 (or 4830106 counting only the distinct ones).

The product of its (nonzero) digits is 46656000, while the sum is 59.

The spelling of 166401155346656 in words is "one hundred sixty-six trillion, four hundred one billion, one hundred fifty-five million, three hundred forty-six thousand, six hundred fifty-six".