1675021045661 has 8 divisors (see below), whose sum is σ = 1676072430144. Its totient is φ = 1673969792320.

The previous prime is 1675021045637. The next prime is 1675021045673. The reversal of 1675021045661 is 1665401205761.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1675021045661 - 2¹⁸ = 1675020783517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1675021045601) 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, 41010896 + ... + 41051718.

It is an arithmetic number, because the mean of its divisors is an integer number (209509053768).

Almost surely, 2^{1675021045661} is an apocalyptic number.

It is an amenable number.

1675021045661 is a deficient number, since it is larger than the sum of its proper divisors (1051384483).

1675021045661 is a wasteful number, since it uses less digits than its factorization.

1675021045661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65571.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 1675021045661 in words is "one trillion, six hundred seventy-five billion, twenty-one million, forty-five thousand, six hundred sixty-one".