66852531 has 12 divisors (see below), whose sum is σ = 97100640. Its totient is φ = 44321040.

The previous prime is 66852529. The next prime is 66852547. The reversal of 66852531 is 13525866.

It is not a de Polignac number, because 66852531 - 2¹ = 66852529 is a prime.

It is a super-2 number, since 2×66852531² = 8938521802211922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66852521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18891 + ... + 22148.

It is an arithmetic number, because the mean of its divisors is an integer number (8091720).

Almost surely, 2^66852531 is an apocalyptic number.

66852531 is a deficient number, since it is larger than the sum of its proper divisors (30248109).

66852531 is a wasteful number, since it uses less digits than its factorization.

66852531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41226 (or 41223 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 66852531 is about 8176.3397067392. The cubic root of 66852531 is about 405.8566048643.

It can be divided in two parts, 6685 and 2531, that added together give a square (9216 = 96²).

The spelling of 66852531 in words is "sixty-six million, eight hundred fifty-two thousand, five hundred thirty-one".