662020001 has 4 divisors (see below), whose sum is σ = 700962372. Its totient is φ = 623077632.

The previous prime is 662019977. The next prime is 662020049. The reversal of 662020001 is 100020266.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 211731601 + 450288400 = 14551^2 + 21220^2 .

It is a cyclic number.

It is not a de Polignac number, because 662020001 - 2⁶ = 662019937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 38942353 = 662020001 / (6 + 6 + 2 + 0 + 2 + 0 + 0 + 0 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662020081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19471160 + ... + 19471193.

It is an arithmetic number, because the mean of its divisors is an integer number (175240593).

Almost surely, 2^662020001 is an apocalyptic number.

It is an amenable number.

662020001 is a deficient number, since it is larger than the sum of its proper divisors (38942371).

662020001 is a wasteful number, since it uses less digits than its factorization.

662020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38942370.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 662020001 is about 25729.7493380717. The cubic root of 662020001 is about 871.5461127368.

Adding to 662020001 its reverse (100020266), we get a palindrome (762040267).

The spelling of 662020001 in words is "six hundred sixty-two million, twenty thousand, one".