690066371 has 2 divisors, whose sum is σ = 690066372. Its totient is φ = 690066370.

The previous prime is 690066359. The next prime is 690066407. The reversal of 690066371 is 173660096.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690066371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (690066341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345033185 + 345033186.

It is an arithmetic number, because the mean of its divisors is an integer number (345033186).

Almost surely, 2^690066371 is an apocalyptic number.

690066371 is a deficient number, since it is larger than the sum of its proper divisors (1).

690066371 is an equidigital number, since it uses as much as digits as its factorization.

690066371 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 690066371 is about 26269.1143931424. The cubic root of 690066371 is about 883.6839242331.

The spelling of 690066371 in words is "six hundred ninety million, sixty-six thousand, three hundred seventy-one".