85477601668 has 6 divisors (see below), whose sum is σ = 149585802926. Its totient is φ = 42738800832.

The previous prime is 85477601647. The next prime is 85477601681. The reversal of 85477601668 is 86610677458.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 84482072964 + 995528704 = 290658^2 + 31552^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10684700205 + ... + 10684700212.

Almost surely, 2^85477601668 is an apocalyptic number.

It is an amenable number.

85477601668 is a deficient number, since it is larger than the sum of its proper divisors (64108201258).

85477601668 is a wasteful number, since it uses less digits than its factorization.

85477601668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21369400421 (or 21369400419 counting only the distinct ones).

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 85477601668 in words is "eighty-five billion, four hundred seventy-seven million, six hundred one thousand, six hundred sixty-eight".