66929743 has 2 divisors, whose sum is σ = 66929744. Its totient is φ = 66929742.

The previous prime is 66929591. The next prime is 66929773. The reversal of 66929743 is 34792966.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66929743 - 2⁹ = 66929231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66929693 and 66929702.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66929773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33464871 + 33464872.

It is an arithmetic number, because the mean of its divisors is an integer number (33464872).

Almost surely, 2^66929743 is an apocalyptic number.

66929743 is a deficient number, since it is larger than the sum of its proper divisors (1).

66929743 is an equidigital number, since it uses as much as digits as its factorization.

66929743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 489888, while the sum is 46.

The square root of 66929743 is about 8181.0600168927. The cubic root of 66929743 is about 406.0127941320.

The spelling of 66929743 in words is "sixty-six million, nine hundred twenty-nine thousand, seven hundred forty-three".