1665051001854 has 16 divisors (see below), whose sum is σ = 3354059573760. Its totient is φ = 551024072280.

The previous prime is 1665051001853. The next prime is 1665051001903. The reversal of 1665051001854 is 4581001505661.

It is a happy number.

It is a super-2 number, since 2×1665051001854² (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 (1665051001853) 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, 998231182 + ... + 998232849.

It is an arithmetic number, because the mean of its divisors is an integer number (209628723360).

Almost surely, 2^{1665051001854} is an apocalyptic number.

1665051001854 is an abundant number, since it is smaller than the sum of its proper divisors (1689008571906).

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

1665051001854 is a wasteful number, since it uses less digits than its factorization.

1665051001854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1996464175.

The product of its (nonzero) digits is 144000, while the sum is 42.

The spelling of 1665051001854 in words is "one trillion, six hundred sixty-five billion, fifty-one million, one thousand, eight hundred fifty-four".