66461930 has 8 divisors (see below), whose sum is σ = 119631492. Its totient is φ = 26584768.

The previous prime is 66461921. The next prime is 66461957. The reversal of 66461930 is 3916466.

It can be written as a sum of positive squares in 2 ways, for example, as 63696361 + 2765569 = 7981^2 + 1663^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3323087 + ... + 3323106.

Almost surely, 2^66461930 is an apocalyptic number.

66461930 is a deficient number, since it is larger than the sum of its proper divisors (53169562).

66461930 is a wasteful number, since it uses less digits than its factorization.

66461930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646200.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 66461930 is about 8152.4186595145. The cubic root of 66461930 is about 405.0646241438.

The spelling of 66461930 in words is "sixty-six million, four hundred sixty-one thousand, nine hundred thirty".