66629140 has 12 divisors (see below), whose sum is σ = 139921236. Its totient is φ = 26651648.

The previous prime is 66629117. The next prime is 66629243. The reversal of 66629140 is 4192666.

It can be written as a sum of positive squares in 2 ways, for example, as 21846276 + 44782864 = 4674^2 + 6692^2 .

It is a junction number, because it is equal to n+sod(n) for n = 66629096 and 66629105.

It is a congruent number.

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, 1665709 + ... + 1665748.

It is an arithmetic number, because the mean of its divisors is an integer number (11660103).

Almost surely, 2^66629140 is an apocalyptic number.

It is an amenable number.

66629140 is an abundant number, since it is smaller than the sum of its proper divisors (73292096).

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

66629140 is a wasteful number, since it uses less digits than its factorization.

66629140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3331466 (or 3331464 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 66629140 is about 8162.6674561690. The cubic root of 66629140 is about 405.4040371694.

The spelling of 66629140 in words is "sixty-six million, six hundred twenty-nine thousand, one hundred forty".