667860953 has 2 divisors, whose sum is σ = 667860954. Its totient is φ = 667860952.

The previous prime is 667860917. The next prime is 667860967. The reversal of 667860953 is 359068766.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 452710729 + 215150224 = 21277^2 + 14668^2 .

It is a cyclic number.

It is not a de Polignac number, because 667860953 - 2²⁴ = 651083737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667860253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333930476 + 333930477.

It is an arithmetic number, because the mean of its divisors is an integer number (333930477).

Almost surely, 2^667860953 is an apocalyptic number.

It is an amenable number.

667860953 is a deficient number, since it is larger than the sum of its proper divisors (1).

667860953 is an equidigital number, since it uses as much as digits as its factorization.

667860953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The square root of 667860953 is about 25843.0058816694. The cubic root of 667860953 is about 874.1018061497.

The spelling of 667860953 in words is "six hundred sixty-seven million, eight hundred sixty thousand, nine hundred fifty-three".