215784835430066 has 24 divisors (see below), whose sum is σ = 384533636397696. Its totient is φ = 90511572306120.

The previous prime is 215784835430057. The next prime is 215784835430083. The reversal of 215784835430066 is 660034538487512.

It is a junction number, because it is equal to n+sod(n) for n = 215784835429990 and 215784835430008.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23424315350 + ... + 23424324561.

It is an arithmetic number, because the mean of its divisors is an integer number (16022234849904).

Almost surely, 2^{215784835430066} is an apocalyptic number.

215784835430066 is a deficient number, since it is larger than the sum of its proper divisors (168748800967630).

215784835430066 is a wasteful number, since it uses less digits than its factorization.

215784835430066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46848639974 (or 46848639967 counting only the distinct ones).

The product of its (nonzero) digits is 116121600, while the sum is 62.

The spelling of 215784835430066 in words is "two hundred fifteen trillion, seven hundred eighty-four billion, eight hundred thirty-five million, four hundred thirty thousand, sixty-six".