99866720505 has 32 divisors (see below), whose sum is σ = 161638646400. Its totient is φ = 52647293952.

The previous prime is 99866720479. The next prime is 99866720543. The reversal of 99866720505 is 50502766899.

It is not a de Polignac number, because 99866720505 - 2¹⁴ = 99866704121 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 612177 + ... + 757953.

It is an arithmetic number, because the mean of its divisors is an integer number (5051207700).

Almost surely, 2^99866720505 is an apocalyptic number.

It is an amenable number.

99866720505 is a deficient number, since it is larger than the sum of its proper divisors (61771925895).

99866720505 is a wasteful number, since it uses less digits than its factorization.

99866720505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146313.

The product of its (nonzero) digits is 8164800, while the sum is 57.

The spelling of 99866720505 in words is "ninety-nine billion, eight hundred sixty-six million, seven hundred twenty thousand, five hundred five".