1661222652733 has 8 divisors (see below), whose sum is σ = 1937285892800. Its totient is φ = 1423905130620.

The previous prime is 1661222652731. The next prime is 1661222652787. The reversal of 1661222652733 is 3372562221661.

It is not a de Polignac number, because 1661222652733 - 2¹ = 1661222652731 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 (1661222652731) 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, 2421607023 + ... + 2421607708.

It is an arithmetic number, because the mean of its divisors is an integer number (242160736600).

Almost surely, 2^{1661222652733} is an apocalyptic number.

It is an amenable number.

1661222652733 is a deficient number, since it is larger than the sum of its proper divisors (276063240067).

1661222652733 is an frugal number, since it uses more digits than its factorization.

1661222652733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4843214752 (or 4843214738 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 46.

The spelling of 1661222652733 in words is "one trillion, six hundred sixty-one billion, two hundred twenty-two million, six hundred fifty-two thousand, seven hundred thirty-three".