166701641 has 2 divisors, whose sum is σ = 166701642. Its totient is φ = 166701640.

The previous prime is 166701629. The next prime is 166701659. The reversal of 166701641 is 146107661.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124970041 + 41731600 = 11179^2 + 6460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-166701641 is a prime.

It is a super-2 number, since 2×166701641² = 55578874224185762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 166701598 and 166701607.

It is not a weakly prime, because it can be changed into another prime (166701341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83350820 + 83350821.

It is an arithmetic number, because the mean of its divisors is an integer number (83350821).

Almost surely, 2^166701641 is an apocalyptic number.

It is an amenable number.

166701641 is a deficient number, since it is larger than the sum of its proper divisors (1).

166701641 is an equidigital number, since it uses as much as digits as its factorization.

166701641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 166701641 is about 12911.2989664092. The cubic root of 166701641 is about 550.3596996915.

The spelling of 166701641 in words is "one hundred sixty-six million, seven hundred one thousand, six hundred forty-one".