620401066 has 16 divisors (see below), whose sum is σ = 939185280. Its totient is φ = 307347040.

The previous prime is 620401051. The next prime is 620401097. The reversal of 620401066 is 660104026.

It is a happy number.

620401066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 620401066.

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, 210495 + ... + 213421.

It is an arithmetic number, because the mean of its divisors is an integer number (58699080).

Almost surely, 2^620401066 is an apocalyptic number.

620401066 is a deficient number, since it is larger than the sum of its proper divisors (318784214).

620401066 is a wasteful number, since it uses less digits than its factorization.

620401066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3869.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 620401066 is about 24907.8514930534. The cubic root of 620401066 is about 852.8857241474.

The spelling of 620401066 in words is "six hundred twenty million, four hundred one thousand, sixty-six".