1665566510610 has 16 divisors (see below), whose sum is σ = 3997359625536. Its totient is φ = 444151069488.

The previous prime is 1665566510603. The next prime is 1665566510611. The reversal of 1665566510610 is 160156655661.

It is a super-2 number, since 2×1665566510610² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1665566510610.

It is not an unprimeable number, because it can be changed into a prime (1665566510611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27759441814 + ... + 27759441873.

It is an arithmetic number, because the mean of its divisors is an integer number (249834976596).

Almost surely, 2^{1665566510610} is an apocalyptic number.

1665566510610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1665566510610 is an abundant number, since it is smaller than the sum of its proper divisors (2331793114926).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1665566510610 is a wasteful number, since it uses less digits than its factorization.

1665566510610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55518883697.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 1665566510610 in words is "one trillion, six hundred sixty-five billion, five hundred sixty-six million, five hundred ten thousand, six hundred ten".