2665197930566 has 4 divisors (see below), whose sum is σ = 3997796895852. Its totient is φ = 1332598965282.

The previous prime is 2665197930559. The next prime is 2665197930581. The reversal of 2665197930566 is 6650397915662.

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, 666299482640 + ... + 666299482643.

It is an arithmetic number, because the mean of its divisors is an integer number (999449223963).

Almost surely, 2^{2665197930566} is an apocalyptic number.

2665197930566 is a deficient number, since it is larger than the sum of its proper divisors (1332598965286).

2665197930566 is a wasteful number, since it uses less digits than its factorization.

2665197930566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1332598965285.

The product of its (nonzero) digits is 110224800, while the sum is 65.

The spelling of 2665197930566 in words is "two trillion, six hundred sixty-five billion, one hundred ninety-seven million, nine hundred thirty thousand, five hundred sixty-six".