84910077866 has 4 divisors (see below), whose sum is σ = 127365116802. Its totient is φ = 42455038932.

The previous prime is 84910077859. The next prime is 84910077877. The reversal of 84910077866 is 66877001948.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 60039210841 + 24870867025 = 245029^2 + 157705^2 .

It is a super-2 number, since 2×84910077866² (a number of 23 digits) contains 22 as substring.

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, 21227519465 + ... + 21227519468.

Almost surely, 2^84910077866 is an apocalyptic number.

84910077866 is a deficient number, since it is larger than the sum of its proper divisors (42455038936).

84910077866 is a wasteful number, since it uses less digits than its factorization.

84910077866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42455038935.

The product of its (nonzero) digits is 4064256, while the sum is 56.

The spelling of 84910077866 in words is "eighty-four billion, nine hundred ten million, seventy-seven thousand, eight hundred sixty-six".