1662001420 has 24 divisors (see below), whose sum is σ = 3575331648. Its totient is φ = 648585600.

The previous prime is 1662001387. The next prime is 1662001423. The reversal of 1662001420 is 241002661.

It is a junction number, because it is equal to n+sod(n) for n = 1662001391 and 1662001400.

It is not an unprimeable number, because it can be changed into a prime (1662001423) 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, 1012596 + ... + 1014235.

It is an arithmetic number, because the mean of its divisors is an integer number (148972152).

Almost surely, 2^1662001420 is an apocalyptic number.

1662001420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662001420 is an abundant number, since it is smaller than the sum of its proper divisors (1913330228).

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

1662001420 is a wasteful number, since it uses less digits than its factorization.

1662001420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2026881 (or 2026879 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1662001420 is about 40767.6516370516. The cubic root of 1662001420 is about 1184.5238153917.

The spelling of 1662001420 in words is "one billion, six hundred sixty-two million, one thousand, four hundred twenty".