85146661 has 2 divisors, whose sum is σ = 85146662. Its totient is φ = 85146660.

The previous prime is 85146647. The next prime is 85146707. The reversal of 85146661 is 16664158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84456100 + 690561 = 9190^2 + 831^2 .

It is a cyclic number.

It is not a de Polignac number, because 85146661 - 2⁷ = 85146533 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85146661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85146631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42573330 + 42573331.

It is an arithmetic number, because the mean of its divisors is an integer number (42573331).

Almost surely, 2^85146661 is an apocalyptic number.

It is an amenable number.

85146661 is a deficient number, since it is larger than the sum of its proper divisors (1).

85146661 is an equidigital number, since it uses as much as digits as its factorization.

85146661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 85146661 is about 9227.4948387956. The cubic root of 85146661 is about 439.9357016925.

The spelling of 85146661 in words is "eighty-five million, one hundred forty-six thousand, six hundred sixty-one".