670550999 has 2 divisors, whose sum is σ = 670551000. Its totient is φ = 670550998.

The previous prime is 670550981. The next prime is 670551029. The reversal of 670550999 is 999055076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670550999 - 2²⁸ = 402115543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670552999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335275499 + 335275500.

It is an arithmetic number, because the mean of its divisors is an integer number (335275500).

Almost surely, 2^670550999 is an apocalyptic number.

670550999 is a deficient number, since it is larger than the sum of its proper divisors (1).

670550999 is an equidigital number, since it uses as much as digits as its factorization.

670550999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 765450, while the sum is 50.

The square root of 670550999 is about 25894.9994979726. Note that the first 3 decimals coincide. The cubic root of 670550999 is about 875.2738186300.

The spelling of 670550999 in words is "six hundred seventy million, five hundred fifty thousand, nine hundred ninety-nine".