1665051566055 has 64 divisors (see below), whose sum is σ = 2766960967680. Its totient is φ = 854497881216.

The previous prime is 1665051566041. The next prime is 1665051566077. The reversal of 1665051566055 is 5506651505661.

It is not a de Polignac number, because 1665051566055 - 2⁸ = 1665051565799 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1665051565989 and 1665051566007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10011004 + ... + 10175966.

It is an arithmetic number, because the mean of its divisors is an integer number (43233765120).

Almost surely, 2^{1665051566055} is an apocalyptic number.

1665051566055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1665051566055 is a deficient number, since it is larger than the sum of its proper divisors (1101909401625).

1665051566055 is a wasteful number, since it uses less digits than its factorization.

1665051566055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165260.

The product of its (nonzero) digits is 4050000, while the sum is 51.

The spelling of 1665051566055 in words is "one trillion, six hundred sixty-five billion, fifty-one million, five hundred sixty-six thousand, fifty-five".