66763305 has 128 divisors (see below), whose sum is σ = 145981440. Its totient is φ = 28304640.

The previous prime is 66763297. The next prime is 66763309. The reversal of 66763305 is 50336766.

It is not a de Polignac number, because 66763305 - 2³ = 66763297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 66763305.

It is not an unprimeable number, because it can be changed into a prime (66763309) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1259659 + ... + 1259711.

It is an arithmetic number, because the mean of its divisors is an integer number (1140480).

Almost surely, 2^66763305 is an apocalyptic number.

It is an amenable number.

66763305 is an abundant number, since it is smaller than the sum of its proper divisors (79218135).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66763305 is a wasteful number, since it uses less digits than its factorization.

66763305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 36.

The square root of 66763305 is about 8170.8815313894. The cubic root of 66763305 is about 405.6759630665.

The spelling of 66763305 in words is "sixty-six million, seven hundred sixty-three thousand, three hundred five".