66013340 has 24 divisors (see below), whose sum is σ = 139436640. Its totient is φ = 26251328.

The previous prime is 66013331. The next prime is 66013351. The reversal of 66013340 is 4331066.

It is a super-2 number, since 2×66013340² = 8715522115911200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6080 + ... + 12999.

It is an arithmetic number, because the mean of its divisors is an integer number (5809860).

Almost surely, 2^66013340 is an apocalyptic number.

It is an amenable number.

66013340 is an abundant number, since it is smaller than the sum of its proper divisors (73423300).

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

66013340 is a wasteful number, since it uses less digits than its factorization.

66013340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19261 (or 19259 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 66013340 is about 8124.8593833986. The cubic root of 66013340 is about 404.1512275724.

The spelling of 66013340 in words is "sixty-six million, thirteen thousand, three hundred forty".