662471997 has 16 divisors (see below), whose sum is σ = 1020278592. Its totient is φ = 377880320.

The previous prime is 662471983. The next prime is 662472011. The reversal of 662471997 is 799174266.

It is an interprime number because it is at equal distance from previous prime (662471983) and next prime (662472011).

It is a cyclic number.

It is not a de Polignac number, because 662471997 - 2⁶ = 662471933 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662471977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589878 + ... + 590999.

It is an arithmetic number, because the mean of its divisors is an integer number (63767412).

Almost surely, 2^662471997 is an apocalyptic number.

It is an amenable number.

662471997 is a deficient number, since it is larger than the sum of its proper divisors (357806595).

662471997 is a wasteful number, since it uses less digits than its factorization.

662471997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180908.

The product of its digits is 1143072, while the sum is 51.

The square root of 662471997 is about 25738.5313683590. The cubic root of 662471997 is about 871.7444177914.

The spelling of 662471997 in words is "six hundred sixty-two million, four hundred seventy-one thousand, nine hundred ninety-seven".