1662020263 has 2 divisors, whose sum is σ = 1662020264. Its totient is φ = 1662020262.

The previous prime is 1662020233. The next prime is 1662020281. The reversal of 1662020263 is 3620202661.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1662020263 - 2¹³ = 1662012071 is a prime.

It is a super-2 number, since 2×1662020263² = 5524622709245178338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1662020233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831010131 + 831010132.

It is an arithmetic number, because the mean of its divisors is an integer number (831010132).

Almost surely, 2^1662020263 is an apocalyptic number.

1662020263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1662020263 is an equidigital number, since it uses as much as digits as its factorization.

1662020263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1662020263 is about 40767.8827387442. The cubic root of 1662020263 is about 1184.5282919017.

The spelling of 1662020263 in words is "one billion, six hundred sixty-two million, twenty thousand, two hundred sixty-three".