162315205666 has 4 divisors (see below), whose sum is σ = 243472808502. Its totient is φ = 81157602832.

The previous prime is 162315205631. The next prime is 162315205667. The reversal of 162315205666 is 666502513261.

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., 120343079025 + 41972126641 = 346905^2 + 204871^2 .

It is not an unprimeable number, because it can be changed into a prime (162315205667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40578801415 + ... + 40578801418.

Almost surely, 2^162315205666 is an apocalyptic number.

162315205666 is a deficient number, since it is larger than the sum of its proper divisors (81157602836).

162315205666 is an equidigital number, since it uses as much as digits as its factorization.

162315205666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81157602835.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 162315205666 in words is "one hundred sixty-two billion, three hundred fifteen million, two hundred five thousand, six hundred sixty-six".