166731627601 has 16 divisors (see below), whose sum is σ = 215041242240. Its totient is φ = 125440721280.

The previous prime is 166731627589. The next prime is 166731627607. The reversal of 166731627601 is 106726137661.

It is not a de Polignac number, because 166731627601 - 2²¹ = 166729530449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (166731627607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37331316 + ... + 37335781.

It is an arithmetic number, because the mean of its divisors is an integer number (13440077640).

Almost surely, 2^166731627601 is an apocalyptic number.

166731627601 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

166731627601 is a deficient number, since it is larger than the sum of its proper divisors (48309614639).

166731627601 is a wasteful number, since it uses less digits than its factorization.

166731627601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74667144.

The product of its (nonzero) digits is 381024, while the sum is 46.

The spelling of 166731627601 in words is "one hundred sixty-six billion, seven hundred thirty-one million, six hundred twenty-seven thousand, six hundred one".