66703740407 has 2 divisors, whose sum is σ = 66703740408. Its totient is φ = 66703740406.

The previous prime is 66703740347. The next prime is 66703740427. The reversal of 66703740407 is 70404730766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66703740407 - 2⁶ = 66703740343 is a prime.

It is a super-3 number, since 3×66703740407³ (a number of 33 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66703740427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33351870203 + 33351870204.

It is an arithmetic number, because the mean of its divisors is an integer number (33351870204).

Almost surely, 2^66703740407 is an apocalyptic number.

66703740407 is a deficient number, since it is larger than the sum of its proper divisors (1).

66703740407 is an equidigital number, since it uses as much as digits as its factorization.

66703740407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 592704, while the sum is 44.

The spelling of 66703740407 in words is "sixty-six billion, seven hundred three million, seven hundred forty thousand, four hundred seven".