166701501 has 12 divisors (see below), whose sum is σ = 242326812. Its totient is φ = 110425536.

The previous prime is 166701499. The next prime is 166701503. The reversal of 166701501 is 105107661.

It is an interprime number because it is at equal distance from previous prime (166701499) and next prime (166701503).

It can be written as a sum of positive squares in 2 ways, for example, as 18714276 + 147987225 = 4326^2 + 12165^2 .

It is not a de Polignac number, because 166701501 - 2¹ = 166701499 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166701503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57576 + ... + 60401.

It is an arithmetic number, because the mean of its divisors is an integer number (20193901).

Almost surely, 2^166701501 is an apocalyptic number.

It is an amenable number.

166701501 is a deficient number, since it is larger than the sum of its proper divisors (75625311).

166701501 is a wasteful number, since it uses less digits than its factorization.

166701501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118140 (or 118137 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 27.

The square root of 166701501 is about 12911.2935448002. The cubic root of 166701501 is about 550.3595456231.

The spelling of 166701501 in words is "one hundred sixty-six million, seven hundred one thousand, five hundred one".