665470028122 has 4 divisors (see below), whose sum is σ = 998205042186. Its totient is φ = 332735014060.

The previous prime is 665470028117. The next prime is 665470028123. The reversal of 665470028122 is 221820074566.

It is a happy number.

665470028122 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 490813737561 + 174656290561 = 700581^2 + 417919^2 .

It is not an unprimeable number, because it can be changed into a prime (665470028123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166367507029 + ... + 166367507032.

Almost surely, 2^665470028122 is an apocalyptic number.

665470028122 is a deficient number, since it is larger than the sum of its proper divisors (332735014064).

665470028122 is a wasteful number, since it uses less digits than its factorization.

665470028122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332735014063.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 665470028122 in words is "six hundred sixty-five billion, four hundred seventy million, twenty-eight thousand, one hundred twenty-two".