66475142 has 4 divisors (see below), whose sum is σ = 99712716. Its totient is φ = 33237570.

The previous prime is 66475127. The next prime is 66475159. The reversal of 66475142 is 24157466.

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

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, 16618784 + ... + 16618787.

It is an arithmetic number, because the mean of its divisors is an integer number (24928179).

Almost surely, 2^66475142 is an apocalyptic number.

66475142 is a deficient number, since it is larger than the sum of its proper divisors (33237574).

66475142 is a wasteful number, since it uses less digits than its factorization.

66475142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33237573.

The product of its digits is 40320, while the sum is 35.

The square root of 66475142 is about 8153.2289309206. The cubic root of 66475142 is about 405.0914633645.

The spelling of 66475142 in words is "sixty-six million, four hundred seventy-five thousand, one hundred forty-two".