99660787 has 4 divisors (see below), whose sum is σ = 100388376. Its totient is φ = 98933200.

The previous prime is 99660767. The next prime is 99660793. The reversal of 99660787 is 78706699.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99660787 is a prime.

It is a super-3 number, since 3×99660787³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99660767) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 363589 + ... + 363862.

It is an arithmetic number, because the mean of its divisors is an integer number (25097094).

Almost surely, 2^99660787 is an apocalyptic number.

99660787 is a deficient number, since it is larger than the sum of its proper divisors (727589).

99660787 is a wasteful number, since it uses less digits than its factorization.

99660787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727588.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 99660787 is about 9983.0249423709. The cubic root of 99660787 is about 463.6334597199.

The spelling of 99660787 in words is "ninety-nine million, six hundred sixty thousand, seven hundred eighty-seven".