2665539998 has 16 divisors (see below), whose sum is σ = 4369244544. Its totient is φ = 1209539160.

The previous prime is 2665539983. The next prime is 2665540013. The reversal of 2665539998 is 8999355662.

It is an interprime number because it is at equal distance from previous prime (2665539983) and next prime (2665540013).

It is a self number, because there is not a number n which added to its sum of digits gives 2665539998.

It is a congruent 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, 90290 + ... + 116117.

It is an arithmetic number, because the mean of its divisors is an integer number (273077784).

Almost surely, 2^2665539998 is an apocalyptic number.

2665539998 is a deficient number, since it is larger than the sum of its proper divisors (1703704546).

2665539998 is a wasteful number, since it uses less digits than its factorization.

2665539998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207007.

The product of its digits is 31492800, while the sum is 62.

The square root of 2665539998 is about 51628.8678744750. The cubic root of 2665539998 is about 1386.5272240848.

The spelling of 2665539998 in words is "two billion, six hundred sixty-five million, five hundred thirty-nine thousand, nine hundred ninety-eight".