16663007505 has 32 divisors (see below), whose sum is σ = 28117923840. Its totient is φ = 8403030720.

The previous prime is 16663007503. The next prime is 16663007513. The reversal of 16663007505 is 50570036661.

It is not a de Polignac number, because 16663007505 - 2¹ = 16663007503 is a prime.

It is a super-2 number, since 2×16663007505² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16663007503) 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, 93160 + ... + 204950.

It is an arithmetic number, because the mean of its divisors is an integer number (878685120).

Almost surely, 2^16663007505 is an apocalyptic number.

16663007505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16663007505 is a deficient number, since it is larger than the sum of its proper divisors (11454916335).

16663007505 is a wasteful number, since it uses less digits than its factorization.

16663007505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112341.

The product of its (nonzero) digits is 113400, while the sum is 39.

The spelling of 16663007505 in words is "sixteen billion, six hundred sixty-three million, seven thousand, five hundred five".