66268831 has 2 divisors, whose sum is σ = 66268832. Its totient is φ = 66268830.

The previous prime is 66268817. The next prime is 66268841. The reversal of 66268831 is 13886266.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 66268831 - 2¹³ = 66260639 is a prime.

It is a super-2 number, since 2×66268831² = 8783115924213122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66268801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33134415 + 33134416.

It is an arithmetic number, because the mean of its divisors is an integer number (33134416).

Almost surely, 2^66268831 is an apocalyptic number.

66268831 is a deficient number, since it is larger than the sum of its proper divisors (1).

66268831 is an equidigital number, since it uses as much as digits as its factorization.

66268831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 66268831 is about 8140.5669949949. The cubic root of 66268831 is about 404.6719509865.

The spelling of 66268831 in words is "sixty-six million, two hundred sixty-eight thousand, eight hundred thirty-one".