66247152 has 20 divisors (see below), whose sum is σ = 171138600. Its totient is φ = 22082368.

The previous prime is 66247151. The next prime is 66247169. The reversal of 66247152 is 25174266.

It is a super-2 number, since 2×66247152² = 8777370296222208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66247151) 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, 690027 + ... + 690122.

It is an arithmetic number, because the mean of its divisors is an integer number (8556930).

Almost surely, 2^66247152 is an apocalyptic number.

It is an amenable number.

66247152 is an abundant number, since it is smaller than the sum of its proper divisors (104891448).

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

66247152 is a wasteful number, since it uses less digits than its factorization.

66247152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380160 (or 1380154 counting only the distinct ones).

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

The square root of 66247152 is about 8139.2353449203. The cubic root of 66247152 is about 404.6278184236.

The spelling of 66247152 in words is "sixty-six million, two hundred forty-seven thousand, one hundred fifty-two".