142577395666 has 4 divisors (see below), whose sum is σ = 213866093502. Its totient is φ = 71288697832.

The previous prime is 142577395661. The next prime is 142577395679. The reversal of 142577395666 is 666593775241.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 132601581025 + 9975814641 = 364145^2 + 99879^2 .

It is not an unprimeable number, because it can be changed into a prime (142577395661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35644348915 + ... + 35644348918.

Almost surely, 2^142577395666 is an apocalyptic number.

142577395666 is a deficient number, since it is larger than the sum of its proper divisors (71288697836).

142577395666 is an equidigital number, since it uses as much as digits as its factorization.

142577395666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71288697835.

The product of its digits is 57153600, while the sum is 61.

The spelling of 142577395666 in words is "one hundred forty-two billion, five hundred seventy-seven million, three hundred ninety-five thousand, six hundred sixty-six".