1665000560655 has 48 divisors (see below), whose sum is σ = 2980269237504. Its totient is φ = 859017208320.

The previous prime is 1665000560647. The next prime is 1665000560681. The reversal of 1665000560655 is 5560650005661.

It is not a de Polignac number, because 1665000560655 - 2³ = 1665000560647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1665000560655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3333627 + ... + 3800403.

It is an arithmetic number, because the mean of its divisors is an integer number (62088942448).

Almost surely, 2^{1665000560655} is an apocalyptic number.

1665000560655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1665000560655 is a deficient number, since it is larger than the sum of its proper divisors (1315268676849).

1665000560655 is a wasteful number, since it uses less digits than its factorization.

1665000560655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469376 (or 469373 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

It can be divided in two parts, 16650005606 and 55, that added together give a palindrome (16650005661).

The spelling of 1665000560655 in words is "one trillion, six hundred sixty-five billion, five hundred sixty thousand, six hundred fifty-five".