66763331 has 2 divisors, whose sum is σ = 66763332. Its totient is φ = 66763330.

The previous prime is 66763327. The next prime is 66763337. The reversal of 66763331 is 13336766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66763331 - 2² = 66763327 is a prime.

It is a super-2 number, since 2×66763331² = 8914684732431122, which contains 22 as substring.

It is equal to p_3938642 and since 66763331 and 3938642 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 66763291 and 66763300.

It is not a weakly prime, because it can be changed into another prime (66763337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33381665 + 33381666.

It is an arithmetic number, because the mean of its divisors is an integer number (33381666).

Almost surely, 2^66763331 is an apocalyptic number.

66763331 is a deficient number, since it is larger than the sum of its proper divisors (1).

66763331 is an equidigital number, since it uses as much as digits as its factorization.

66763331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 35.

The square root of 66763331 is about 8170.8831224048. The cubic root of 66763331 is about 405.6760157281.

The spelling of 66763331 in words is "sixty-six million, seven hundred sixty-three thousand, three hundred thirty-one".