66672142 has 4 divisors (see below), whose sum is σ = 100008216. Its totient is φ = 33336070.

The previous prime is 66672127. The next prime is 66672163. The reversal of 66672142 is 24127666.

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

It is a junction number, because it is equal to n+sod(n) for n = 66672098 and 66672107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16668034 + ... + 16668037.

It is an arithmetic number, because the mean of its divisors is an integer number (25002054).

Almost surely, 2^66672142 is an apocalyptic number.

66672142 is a deficient number, since it is larger than the sum of its proper divisors (33336074).

66672142 is a wasteful number, since it uses less digits than its factorization.

66672142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33336073.

The product of its digits is 24192, while the sum is 34.

The square root of 66672142 is about 8165.3010967141. The cubic root of 66672142 is about 405.4912334288.

The spelling of 66672142 in words is "sixty-six million, six hundred seventy-two thousand, one hundred forty-two".