66430964 has 12 divisors (see below), whose sum is σ = 116314884. Its totient is φ = 33198144.

The previous prime is 66430963. The next prime is 66430979. The reversal of 66430964 is 46903466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 45454564 + 20976400 = 6742^2 + 4580^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66430963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8522 + ... + 14334.

It is an arithmetic number, because the mean of its divisors is an integer number (9692907).

Almost surely, 2^66430964 is an apocalyptic number.

It is an amenable number.

66430964 is a deficient number, since it is larger than the sum of its proper divisors (49883920).

66430964 is a wasteful number, since it uses less digits than its factorization.

66430964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8674 (or 8672 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 38.

The square root of 66430964 is about 8150.5192472627. The cubic root of 66430964 is about 405.0017050175.

The spelling of 66430964 in words is "sixty-six million, four hundred thirty thousand, nine hundred sixty-four".