66250040 has 16 divisors (see below), whose sum is σ = 149062680. Its totient is φ = 26500000.

The previous prime is 66250027. The next prime is 66250073. The reversal of 66250040 is 4005266.

It is a junction number, because it is equal to n+sod(n) for n = 66249988 and 66250015.

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, 828086 + ... + 828165.

Almost surely, 2^66250040 is an apocalyptic number.

It is an amenable number.

66250040 is an abundant number, since it is smaller than the sum of its proper divisors (82812640).

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

66250040 is a wasteful number, since it uses less digits than its factorization.

66250040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656262 (or 1656258 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 66250040 is about 8139.4127552299. The cubic root of 66250040 is about 404.6336981640.

The spelling of 66250040 in words is "sixty-six million, two hundred fifty thousand, forty".