66380040 has 64 divisors (see below), whose sum is σ = 221270400. Its totient is φ = 17701056.

The previous prime is 66380011. The next prime is 66380051. The reversal of 66380040 is 4008366.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 66379986 and 66380013.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29652 + ... + 31811.

It is an arithmetic number, because the mean of its divisors is an integer number (3457350).

Almost surely, 2^66380040 is an apocalyptic number.

66380040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

66380040 is an abundant number, since it is smaller than the sum of its proper divisors (154890360).

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

66380040 is a wasteful number, since it uses less digits than its factorization.

66380040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61483 (or 61473 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 66380040 is about 8147.3946756003. The cubic root of 66380040 is about 404.8981911447.

The spelling of 66380040 in words is "sixty-six million, three hundred eighty thousand, forty".