1665764493142 has 8 divisors (see below), whose sum is σ = 2498774547600. Its totient is φ = 832839643944.

The previous prime is 1665764493109. The next prime is 1665764493143. The reversal of 1665764493142 is 2413944675661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1665764493142² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1665764493143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21252417 + ... + 21330652.

It is an arithmetic number, because the mean of its divisors is an integer number (312346818450).

Almost surely, 2^{1665764493142} is an apocalyptic number.

1665764493142 is a deficient number, since it is larger than the sum of its proper divisors (833010054458).

1665764493142 is a wasteful number, since it uses less digits than its factorization.

1665764493142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42602630.

The product of its digits is 26127360, while the sum is 58.

The spelling of 1665764493142 in words is "one trillion, six hundred sixty-five billion, seven hundred sixty-four million, four hundred ninety-three thousand, one hundred forty-two".