670591951 has 2 divisors, whose sum is σ = 670591952. Its totient is φ = 670591950.

The previous prime is 670591913. The next prime is 670591973. The reversal of 670591951 is 159195076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670591951 - 2¹³ = 670583759 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 670591898 and 670591907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670591451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335295975 + 335295976.

It is an arithmetic number, because the mean of its divisors is an integer number (335295976).

Almost surely, 2^670591951 is an apocalyptic number.

670591951 is a deficient number, since it is larger than the sum of its proper divisors (1).

670591951 is an equidigital number, since it uses as much as digits as its factorization.

670591951 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 85050, while the sum is 43.

The square root of 670591951 is about 25895.7902177169. The cubic root of 670591951 is about 875.2916365558.

The spelling of 670591951 in words is "six hundred seventy million, five hundred ninety-one thousand, nine hundred fifty-one".