66457752 has 16 divisors (see below), whose sum is σ = 166144440. Its totient is φ = 22152576.

The previous prime is 66457751. The next prime is 66457757. The reversal of 66457752 is 25775466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66457751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384513 + ... + 1384560.

Almost surely, 2^66457752 is an apocalyptic number.

It is an amenable number.

66457752 is an abundant number, since it is smaller than the sum of its proper divisors (99686688).

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

66457752 is a wasteful number, since it uses less digits than its factorization.

66457752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769082 (or 2769078 counting only the distinct ones).

The product of its digits is 352800, while the sum is 42.

The square root of 66457752 is about 8152.1624125136. The cubic root of 66457752 is about 405.0561360993.

The spelling of 66457752 in words is "sixty-six million, four hundred fifty-seven thousand, seven hundred fifty-two".