123165202666 has 16 divisors (see below), whose sum is σ = 208492820640. Its totient is φ = 54053693680.

The previous prime is 123165202651. The next prime is 123165202757. The reversal of 123165202666 is 666202561321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96523816 + ... + 96525091.

It is an arithmetic number, because the mean of its divisors is an integer number (13030801290).

Almost surely, 2^123165202666 is an apocalyptic number.

123165202666 is a deficient number, since it is larger than the sum of its proper divisors (85327617974).

123165202666 is a wasteful number, since it uses less digits than its factorization.

123165202666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193048949.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 123165202666 its reverse (666202561321), we get a palindrome (789367763987).

The spelling of 123165202666 in words is "one hundred twenty-three billion, one hundred sixty-five million, two hundred two thousand, six hundred sixty-six".