66157052 has 24 divisors (see below), whose sum is σ = 125352192. Its totient is φ = 30369600.

The previous prime is 66157051. The next prime is 66157057. The reversal of 66157052 is 25075166.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66157051) 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, 6602 + ... + 13262.

It is an arithmetic number, because the mean of its divisors is an integer number (5223008).

Almost surely, 2^66157052 is an apocalyptic number.

It is an amenable number.

66157052 is a deficient number, since it is larger than the sum of its proper divisors (59195140).

66157052 is a wasteful number, since it uses less digits than its factorization.

66157052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6869 (or 6867 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 66157052 is about 8133.6985437131. The cubic root of 66157052 is about 404.4442960346. Note that the first 3 decimals are identical.

The spelling of 66157052 in words is "sixty-six million, one hundred fifty-seven thousand, fifty-two".