670681783 has 2 divisors, whose sum is σ = 670681784. Its totient is φ = 670681782.

The previous prime is 670681757. The next prime is 670681787. The reversal of 670681783 is 387186076.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670681783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670681787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335340891 + 335340892.

It is an arithmetic number, because the mean of its divisors is an integer number (335340892).

Almost surely, 2^670681783 is an apocalyptic number.

670681783 is a deficient number, since it is larger than the sum of its proper divisors (1).

670681783 is an equidigital number, since it uses as much as digits as its factorization.

670681783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 670681783 is about 25897.5246500510. The cubic root of 670681783 is about 875.3307192833.

The spelling of 670681783 in words is "six hundred seventy million, six hundred eighty-one thousand, seven hundred eighty-three".