620040066 has 16 divisors (see below), whose sum is σ = 1240474944. Its totient is φ = 206614224.

The previous prime is 620040013. The next prime is 620040067. The reversal of 620040066 is 660040026.

It is not an unprimeable number, because it can be changed into a prime (620040067) 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, 6411 + ... + 35793.

It is an arithmetic number, because the mean of its divisors is an integer number (77529684).

Almost surely, 2^620040066 is an apocalyptic number.

620040066 is an abundant number, since it is smaller than the sum of its proper divisors (620434878).

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

620040066 is a wasteful number, since it uses less digits than its factorization.

620040066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32905.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 620040066 is about 24900.6037276207. The cubic root of 620040066 is about 852.7202658649.

The spelling of 620040066 in words is "six hundred twenty million, forty thousand, sixty-six".