16665655610 has 16 divisors (see below), whose sum is σ = 29999759400. Its totient is φ = 6665911296.

The previous prime is 16665655549. The next prime is 16665655619. The reversal of 16665655610 is 1655656661.

It can be written as a sum of positive squares in 4 ways, for example, as 11146502929 + 5519152681 = 105577^2 + 74291^2 .

It is a super-2 number, since 2×16665655610² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16665655619) 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 7 ways as a sum of consecutive naturals, for example, 248126 + ... + 308054.

Almost surely, 2^16665655610 is an apocalyptic number.

16665655610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16665655610 is a deficient number, since it is larger than the sum of its proper divisors (13334103790).

16665655610 is a wasteful number, since it uses less digits than its factorization.

16665655610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87745.

The product of its (nonzero) digits is 972000, while the sum is 47.

The spelling of 16665655610 in words is "sixteen billion, six hundred sixty-five million, six hundred fifty-five thousand, six hundred ten".