99999666554 has 8 divisors (see below), whose sum is σ = 150672144000. Its totient is φ = 49775618556.

The previous prime is 99999666553. The next prime is 99999666583. The reversal of 99999666554 is 45566699999.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×99999666554² (a number of 23 digits) contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99999666553) 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 in 3 ways as a sum of consecutive naturals, for example, 112106804 + ... + 112107695.

It is an arithmetic number, because the mean of its divisors is an integer number (18834018000).

Almost surely, 2^99999666554 is an apocalyptic number.

99999666554 is a deficient number, since it is larger than the sum of its proper divisors (50672477446).

99999666554 is a wasteful number, since it uses less digits than its factorization.

99999666554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224214724.

The product of its digits is 1275458400, while the sum is 77.

The spelling of 99999666554 in words is "ninety-nine billion, nine hundred ninety-nine million, six hundred sixty-six thousand, five hundred fifty-four".