834666666438 has 16 divisors (see below), whose sum is σ = 1821090908736. Its totient is φ = 252929292840.

The previous prime is 834666666437. The next prime is 834666666467.

834666666438 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 12646464643 = 834666666438 / (8 + 3 + 4 + 6 + 6 + 6 + 6 + 6 + 6 + 4 + 3 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834666666437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6323232256 + ... + 6323232387.

It is an arithmetic number, because the mean of its divisors is an integer number (113818181796).

Almost surely, 2^834666666438 is an apocalyptic number.

834666666438 is an abundant number, since it is smaller than the sum of its proper divisors (986424242298).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

834666666438 is a wasteful number, since it uses less digits than its factorization.

834666666438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12646464659.

The product of its digits is 429981696, while the sum is 66.

The spelling of 834666666438 in words is "eight hundred thirty-four billion, six hundred sixty-six million, six hundred sixty-six thousand, four hundred thirty-eight".