2666663654098 has 4 divisors (see below), whose sum is σ = 3999995481150. Its totient is φ = 1333331827048.

The previous prime is 2666663654093. The next prime is 2666663654143. The reversal of 2666663654098 is 8904563666662.

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., 1450634762929 + 1216028891169 = 1204423^2 + 1102737^2 .

It is a super-2 number, since 2×2666663654098² (a number of 26 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2666663654093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666665913523 + ... + 666665913526.

Almost surely, 2^{2666663654098} is an apocalyptic number.

2666663654098 is a deficient number, since it is larger than the sum of its proper divisors (1333331827052).

2666663654098 is a wasteful number, since it uses less digits than its factorization.

2666663654098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1333331827051.

The product of its (nonzero) digits is 403107840, while the sum is 67.

The spelling of 2666663654098 in words is "two trillion, six hundred sixty-six billion, six hundred sixty-three million, six hundred fifty-four thousand, ninety-eight".