66142895 has 48 divisors (see below), whose sum is σ = 104761440. Its totient is φ = 39626496.

The previous prime is 66142873. The next prime is 66142907. The reversal of 66142895 is 59824166.

It is a happy number.

It is not a de Polignac number, because 66142895 - 2⁶ = 66142831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59969 + ... + 61061.

It is an arithmetic number, because the mean of its divisors is an integer number (2182530).

Almost surely, 2^66142895 is an apocalyptic number.

66142895 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

66142895 is a deficient number, since it is larger than the sum of its proper divisors (38618545).

66142895 is a wasteful number, since it uses less digits than its factorization.

66142895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144 (or 1137 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 66142895 is about 8132.8282288513. The cubic root of 66142895 is about 404.4154448580.

The spelling of 66142895 in words is "sixty-six million, one hundred forty-two thousand, eight hundred ninety-five".