66149320 has 32 divisors (see below), whose sum is σ = 149153400. Its totient is φ = 26403328.

The previous prime is 66149299. The next prime is 66149323. The reversal of 66149320 is 2394166.

It can be written as a sum of positive squares in 4 ways, for example, as 15824484 + 50324836 = 3978^2 + 7094^2 .

It is not an unprimeable number, because it can be changed into a prime (66149323) 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, 20796 + ... + 23764.

Almost surely, 2^66149320 is an apocalyptic number.

It is an amenable number.

66149320 is an abundant number, since it is smaller than the sum of its proper divisors (83004080).

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

66149320 is a wasteful number, since it uses less digits than its factorization.

66149320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3537 (or 3533 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 66149320 is about 8133.2232232984. The cubic root of 66149320 is about 404.4285391599.

The spelling of 66149320 in words is "sixty-six million, one hundred forty-nine thousand, three hundred twenty".