66457552 has 40 divisors (see below), whose sum is σ = 151910912. Its totient is φ = 27561600.

The previous prime is 66457549. The next prime is 66457553. The reversal of 66457552 is 25575466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66457553) 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, 6099 + ... + 13042.

Almost surely, 2^66457552 is an apocalyptic number.

66457552 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

66457552 is an abundant number, since it is smaller than the sum of its proper divisors (85453360).

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

66457552 is a wasteful number, since it uses less digits than its factorization.

66457552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19187 (or 19181 counting only the distinct ones).

The product of its digits is 252000, while the sum is 40.

The square root of 66457552 is about 8152.1501458204. The cubic root of 66457552 is about 405.0557297694.

The spelling of 66457552 in words is "sixty-six million, four hundred fifty-seven thousand, five hundred fifty-two".