6699987477505 has 32 divisors (see below), whose sum is σ = 9223511938560. Its totient is φ = 4576801259520.

The previous prime is 6699987477503. The next prime is 6699987477539. The reversal of 6699987477505 is 5057747899966.

It is not a de Polignac number, because 6699987477505 - 2¹ = 6699987477503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6699987477503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 144600652 + ... + 144646978.

It is an arithmetic number, because the mean of its divisors is an integer number (288234748080).

Almost surely, 2^{6699987477505} is an apocalyptic number.

It is an amenable number.

6699987477505 is a deficient number, since it is larger than the sum of its proper divisors (2523524461055).

6699987477505 is a wasteful number, since it uses less digits than its factorization.

6699987477505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61969.

The product of its (nonzero) digits is 7201353600, while the sum is 82.

The spelling of 6699987477505 in words is "six trillion, six hundred ninety-nine billion, nine hundred eighty-seven million, four hundred seventy-seven thousand, five hundred five".