1661233142 has 16 divisors (see below), whose sum is σ = 2549809152. Its totient is φ = 811365480.

The previous prime is 1661233127. The next prime is 1661233151. The reversal of 1661233142 is 2413321661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32267 + ... + 66057.

It is an arithmetic number, because the mean of its divisors is an integer number (159363072).

Almost surely, 2^1661233142 is an apocalyptic number.

1661233142 is a deficient number, since it is larger than the sum of its proper divisors (888576010).

1661233142 is a wasteful number, since it uses less digits than its factorization.

1661233142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34363.

The product of its digits is 5184, while the sum is 29.

The square root of 1661233142 is about 40758.2279055407. The cubic root of 1661233142 is about 1184.3412676436.

The spelling of 1661233142 in words is "one billion, six hundred sixty-one million, two hundred thirty-three thousand, one hundred forty-two".