1620066 has 32 divisors (see below), whose sum is σ = 3922560. Its totient is φ = 435456.

The previous prime is 1620041. The next prime is 1620071. The reversal of 1620066 is 6600261.

It is a super-2 number, since 2×1620066² = 5249227688712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 421 + ... + 1848.

It is an arithmetic number, because the mean of its divisors is an integer number (122580).

2^1620066 is an apocalyptic number.

1620066 is an abundant number, since it is smaller than the sum of its proper divisors (2302494).

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

1620066 is a wasteful number, since it uses less digits than its factorization.

1620066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1620066 is about 1272.8181331204. The cubic root of 1620066 is about 117.4476241595.

The spelling of 1620066 in words is "one million, six hundred twenty thousand, sixty-six".