1020662001 has 24 divisors (see below), whose sum is σ = 1489192640. Its totient is φ = 673596000.

The previous prime is 1020661973. The next prime is 1020662009. The reversal of 1020662001 is 1002660201.

It is a happy number.

1020662001 is a `hidden beast` number, since 1 + 0 + 2 + 0 + 662 + 0 + 0 + 1 = 666.

1020662001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-1020662001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020662009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 448695 + ... + 450963.

Almost surely, 2^1020662001 is an apocalyptic number.

It is an amenable number.

1020662001 is a deficient number, since it is larger than the sum of its proper divisors (468530639).

1020662001 is a wasteful number, since it uses less digits than its factorization.

1020662001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2757 (or 2754 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1020662001 is about 31947.8011919443. The cubic root of 1020662001 is about 1006.8404354184.

The spelling of 1020662001 in words is "one billion, twenty million, six hundred sixty-two thousand, one".