1660665142 has 8 divisors (see below), whose sum is σ = 2491228296. Its totient is φ = 830255712.

The previous prime is 1660665119. The next prime is 1660665143. The reversal of 1660665142 is 2415660661.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660665143) 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, 5923 + ... + 57934.

It is an arithmetic number, because the mean of its divisors is an integer number (311403537).

Almost surely, 2^1660665142 is an apocalyptic number.

1660665142 is a deficient number, since it is larger than the sum of its proper divisors (830563154).

1660665142 is a wasteful number, since it uses less digits than its factorization.

1660665142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76862.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 1660665142 is about 40751.2593915820. The cubic root of 1660665142 is about 1184.2062710344.

The spelling of 1660665142 in words is "one billion, six hundred sixty million, six hundred sixty-five thousand, one hundred forty-two".