670655567 has 2 divisors, whose sum is σ = 670655568. Its totient is φ = 670655566.

The previous prime is 670655561. The next prime is 670655633. The reversal of 670655567 is 765556076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670655567 - 2⁸ = 670655311 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670655561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335327783 + 335327784.

It is an arithmetic number, because the mean of its divisors is an integer number (335327784).

Almost surely, 2^670655567 is an apocalyptic number.

670655567 is a deficient number, since it is larger than the sum of its proper divisors (1).

670655567 is an equidigital number, since it uses as much as digits as its factorization.

670655567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1323000, while the sum is 47.

The square root of 670655567 is about 25897.0184963443. The cubic root of 670655567 is about 875.3193139891.

The spelling of 670655567 in words is "six hundred seventy million, six hundred fifty-five thousand, five hundred sixty-seven".