165661116662 has 4 divisors (see below), whose sum is σ = 248491674996. Its totient is φ = 82830558330.

The previous prime is 165661116619. The next prime is 165661116689. The reversal of 165661116662 is 266611166561.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41415279164 + ... + 41415279167.

It is an arithmetic number, because the mean of its divisors is an integer number (62122918749).

Almost surely, 2^165661116662 is an apocalyptic number.

165661116662 is a deficient number, since it is larger than the sum of its proper divisors (82830558334).

165661116662 is an equidigital number, since it uses as much as digits as its factorization.

165661116662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82830558333.

The product of its digits is 466560, while the sum is 47.

The spelling of 165661116662 in words is "one hundred sixty-five billion, six hundred sixty-one million, one hundred sixteen thousand, six hundred sixty-two".