166156066601 has 8 divisors (see below), whose sum is σ = 190208613504. Its totient is φ = 142182511200.

The previous prime is 166156066591. The next prime is 166156066619. The reversal of 166156066601 is 106660651661.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166156066601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166156066501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19743365 + ... + 19751778.

It is an arithmetic number, because the mean of its divisors is an integer number (23776076688).

Almost surely, 2^166156066601 is an apocalyptic number.

It is an amenable number.

166156066601 is a deficient number, since it is larger than the sum of its proper divisors (24052546903).

166156066601 is an equidigital number, since it uses as much as digits as its factorization.

166156066601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39495751.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 166156066601 in words is "one hundred sixty-six billion, one hundred fifty-six million, sixty-six thousand, six hundred one".