66742883 has 2 divisors, whose sum is σ = 66742884. Its totient is φ = 66742882.

The previous prime is 66742829. The next prime is 66742889. The reversal of 66742883 is 38824766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66742883 - 2²⁴ = 49965667 is a prime.

It is a super-2 number, since 2×66742883² = 8909224862303378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (66742889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33371441 + 33371442.

It is an arithmetic number, because the mean of its divisors is an integer number (33371442).

Almost surely, 2^66742883 is an apocalyptic number.

66742883 is a deficient number, since it is larger than the sum of its proper divisors (1).

66742883 is an equidigital number, since it uses as much as digits as its factorization.

66742883 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 44.

The square root of 66742883 is about 8169.6317542469. The cubic root of 66742883 is about 405.6345952354.

The spelling of 66742883 in words is "sixty-six million, seven hundred forty-two thousand, eight hundred eighty-three".