66910007 has 2 divisors, whose sum is σ = 66910008. Its totient is φ = 66910006.

The previous prime is 66909979. The next prime is 66910027. The reversal of 66910007 is 70001966.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66910007 - 2¹² = 66905911 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 (66910027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33455003 + 33455004.

It is an arithmetic number, because the mean of its divisors is an integer number (33455004).

Almost surely, 2^66910007 is an apocalyptic number.

66910007 is a deficient number, since it is larger than the sum of its proper divisors (1).

66910007 is an equidigital number, since it uses as much as digits as its factorization.

66910007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 66910007 is about 8179.8537272986. The cubic root of 66910007 is about 405.9728823484.

The spelling of 66910007 in words is "sixty-six million, nine hundred ten thousand, seven".