83121547466 has 4 divisors (see below), whose sum is σ = 124682321202. Its totient is φ = 41560773732.

The previous prime is 83121547463. The next prime is 83121547469. The reversal of 83121547466 is 66474512138.

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

It is an interprime number because it is at equal distance from previous prime (83121547463) and next prime (83121547469).

It can be written as a sum of positive squares in only one way, i.e., 58150911025 + 24970636441 = 241145^2 + 158021^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 83121547466.

It is not an unprimeable number, because it can be changed into a prime (83121547463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20780386865 + ... + 20780386868.

Almost surely, 2^83121547466 is an apocalyptic number.

83121547466 is a deficient number, since it is larger than the sum of its proper divisors (41560773736).

83121547466 is a wasteful number, since it uses less digits than its factorization.

83121547466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41560773735.

The product of its digits is 967680, while the sum is 47.

The spelling of 83121547466 in words is "eighty-three billion, one hundred twenty-one million, five hundred forty-seven thousand, four hundred sixty-six".