1665211142 has 8 divisors (see below), whose sum is σ = 2854647696. Its totient is φ = 713661912.

The previous prime is 1665211127. The next prime is 1665211199. The reversal of 1665211142 is 2411125661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59471813 + ... + 59471840.

It is an arithmetic number, because the mean of its divisors is an integer number (356830962).

Almost surely, 2^1665211142 is an apocalyptic number.

1665211142 is a deficient number, since it is larger than the sum of its proper divisors (1189436554).

1665211142 is a wasteful number, since it uses less digits than its factorization.

1665211142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118943662.

The product of its digits is 2880, while the sum is 29.

The square root of 1665211142 is about 40806.9986889504. The cubic root of 1665211142 is about 1185.2858579123.

The spelling of 1665211142 in words is "one billion, six hundred sixty-five million, two hundred eleven thousand, one hundred forty-two".