66742152 has 16 divisors (see below), whose sum is σ = 166855440. Its totient is φ = 22247376.

The previous prime is 66742141. The next prime is 66742199. The reversal of 66742152 is 25124766.

It is a super-3 number, since 3×66742152³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1390438 + ... + 1390485.

It is an arithmetic number, because the mean of its divisors is an integer number (10428465).

Almost surely, 2^66742152 is an apocalyptic number.

It is an amenable number.

66742152 is an abundant number, since it is smaller than the sum of its proper divisors (100113288).

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

66742152 is a wasteful number, since it uses less digits than its factorization.

66742152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780932 (or 2780928 counting only the distinct ones).

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

The square root of 66742152 is about 8169.5870152658. The cubic root of 66742152 is about 405.6331143285.

The spelling of 66742152 in words is "sixty-six million, seven hundred forty-two thousand, one hundred fifty-two".