142065666 has 12 divisors (see below), whose sum is σ = 307808982. Its totient is φ = 47355216.

The previous prime is 142065659. The next prime is 142065727. The reversal of 142065666 is 666560241.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 101425041 + 40640625 = 10071^2 + 6375^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 142065666.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3946251 + ... + 3946286.

Almost surely, 2^142065666 is an apocalyptic number.

142065666 is an abundant number, since it is smaller than the sum of its proper divisors (165743316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142065666 is a wasteful number, since it uses less digits than its factorization.

142065666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7892545 (or 7892542 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 142065666 is about 11919.1302535042. The cubic root of 142065666 is about 521.7907515573.

The spelling of 142065666 in words is "one hundred forty-two million, sixty-five thousand, six hundred sixty-six".