85351999661 has 8 divisors (see below), whose sum is σ = 90190337280. Its totient is φ = 80607610512.

The previous prime is 85351999597. The next prime is 85351999669. The reversal of 85351999661 is 16699915358.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 85351999661 - 2⁶ = 85351999597 is a prime.

It is a super-2 number, since 2×85351999661² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85351999594 and 85351999603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85351999669) 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 7 ways as a sum of consecutive naturals, for example, 23485250 + ... + 23488883.

It is an arithmetic number, because the mean of its divisors is an integer number (11273792160).

Almost surely, 2^85351999661 is an apocalyptic number.

It is an amenable number.

85351999661 is a deficient number, since it is larger than the sum of its proper divisors (4838337619).

85351999661 is a wasteful number, since it uses less digits than its factorization.

85351999661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46974235.

The product of its digits is 15746400, while the sum is 62.

The spelling of 85351999661 in words is "eighty-five billion, three hundred fifty-one million, nine hundred ninety-nine thousand, six hundred sixty-one".