1665772590348 has 84 divisors (see below), whose sum is σ = 4453119242208. Its totient is φ = 544780922400.

The previous prime is 1665772590347. The next prime is 1665772590397. The reversal of 1665772590348 is 8430952775661.

1665772590348 is a `hidden beast` number, since 1 + 6 + 6 + 5 + 7 + 7 + 2 + 590 + 34 + 8 = 666.

It is a super-2 number, since 2×1665772590348² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1665772590347) 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 27 ways as a sum of consecutive naturals, for example, 5234628 + ... + 5543723.

It is an arithmetic number, because the mean of its divisors is an integer number (53013324312).

It is a 1-persistent number, because it is pandigital, but 2⋅1665772590348 = 3331545180696 is not.

Almost surely, 2^{1665772590348} is an apocalyptic number.

1665772590348 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1665772590348 is an abundant number, since it is smaller than the sum of its proper divisors (2787346651860).

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

1665772590348 is a wasteful number, since it uses less digits than its factorization.

1665772590348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778426 (or 10778409 counting only the distinct ones).

The product of its (nonzero) digits is 76204800, while the sum is 63.

The spelling of 1665772590348 in words is "one trillion, six hundred sixty-five billion, seven hundred seventy-two million, five hundred ninety thousand, three hundred forty-eight".