1668425001761 has 4 divisors (see below), whose sum is σ = 1906771430592. Its totient is φ = 1430078572932.

The previous prime is 1668425001751. The next prime is 1668425001769. The reversal of 1668425001761 is 1671005248661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1668425001761 - 2³⁴ = 1651245132577 is a prime.

It is a super-2 number, since 2×1668425001761² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1668425001769) 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, 119173214405 + ... + 119173214418.

It is an arithmetic number, because the mean of its divisors is an integer number (476692857648).

Almost surely, 2^{1668425001761} is an apocalyptic number.

It is an amenable number.

1668425001761 is a deficient number, since it is larger than the sum of its proper divisors (238346428831).

1668425001761 is an equidigital number, since it uses as much as digits as its factorization.

1668425001761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238346428830.

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 1668425001761 in words is "one trillion, six hundred sixty-eight billion, four hundred twenty-five million, one thousand, seven hundred sixty-one".