662681431 has 2 divisors, whose sum is σ = 662681432. Its totient is φ = 662681430.

The previous prime is 662681429. The next prime is 662681441. The reversal of 662681431 is 134186266.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 662681431 - 2¹ = 662681429 is a prime.

It is a super-2 number, since 2×662681431² = 878293357984415522, which contains 22 as substring.

Together with 662681429, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (662681441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331340715 + 331340716.

It is an arithmetic number, because the mean of its divisors is an integer number (331340716).

Almost surely, 2^662681431 is an apocalyptic number.

662681431 is a deficient number, since it is larger than the sum of its proper divisors (1).

662681431 is an equidigital number, since it uses as much as digits as its factorization.

662681431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 662681431 is about 25742.5995385081. The cubic root of 662681431 is about 871.8362725843.

The spelling of 662681431 in words is "six hundred sixty-two million, six hundred eighty-one thousand, four hundred thirty-one".