1662005247 has 16 divisors (see below), whose sum is σ = 2533911552. Its totient is φ = 949217760.

The previous prime is 1662005237. The next prime is 1662005269. The reversal of 1662005247 is 7425002661.

It is not a de Polignac number, because 1662005247 - 2¹⁴ = 1661988863 is a prime.

It is a super-2 number, since 2×1662005247² = 5524522882111062018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1662005227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22122 + ... + 61752.

It is an arithmetic number, because the mean of its divisors is an integer number (158369472).

Almost surely, 2^1662005247 is an apocalyptic number.

1662005247 is a deficient number, since it is larger than the sum of its proper divisors (871906305).

1662005247 is a wasteful number, since it uses less digits than its factorization.

1662005247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41638.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 1662005247 is about 40767.6985737483. The cubic root of 1662005247 is about 1184.5247245705.

The spelling of 1662005247 in words is "one billion, six hundred sixty-two million, five thousand, two hundred forty-seven".