66142752 has 48 divisors (see below), whose sum is σ = 186984000. Its totient is φ = 20351232.

The previous prime is 66142751. The next prime is 66142759. The reversal of 66142752 is 25724166.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (66142751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25252 + ... + 27747.

It is an arithmetic number, because the mean of its divisors is an integer number (3895500).

Almost surely, 2^66142752 is an apocalyptic number.

It is an amenable number.

66142752 is an abundant number, since it is smaller than the sum of its proper divisors (120841248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66142752 is a wasteful number, since it uses less digits than its factorization.

66142752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53025 (or 53017 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 66142752 is about 8132.8194373169. The cubic root of 66142752 is about 404.4151534110.

The spelling of 66142752 in words is "sixty-six million, one hundred forty-two thousand, seven hundred fifty-two".