142606666 has 8 divisors (see below), whose sum is σ = 225168480. Its totient is φ = 67550508.

The previous prime is 142606643. The next prime is 142606687. The reversal of 142606666 is 666606241.

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

It is a super-2 number, since 2×142606666² = 40673322375271112, which contains 22 as substring.

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, 1876366 + ... + 1876441.

It is an arithmetic number, because the mean of its divisors is an integer number (28146060).

Almost surely, 2^142606666 is an apocalyptic number.

142606666 is a deficient number, since it is larger than the sum of its proper divisors (82561814).

142606666 is a wasteful number, since it uses less digits than its factorization.

142606666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3752828.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 142606666 is about 11941.8032976599. The cubic root of 142606666 is about 522.4522560406.

The spelling of 142606666 in words is "one hundred forty-two million, six hundred six thousand, six hundred sixty-six".