66931460 has 24 divisors (see below), whose sum is σ = 141925056. Its totient is φ = 26511840.

The previous prime is 66931441. The next prime is 66931463. The reversal of 66931460 is 6413966.

It is a self number, because there is not a number n which added to its sum of digits gives 66931460.

It is not an unprimeable number, because it can be changed into a prime (66931463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14186 + ... + 18305.

It is an arithmetic number, because the mean of its divisors is an integer number (5913544).

Almost surely, 2^66931460 is an apocalyptic number.

It is an amenable number.

66931460 is an abundant number, since it is smaller than the sum of its proper divisors (74993596).

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

66931460 is a wasteful number, since it uses less digits than its factorization.

66931460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32603 (or 32601 counting only the distinct ones).

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

The square root of 66931460 is about 8181.1649537214. The cubic root of 66931460 is about 406.0162660214.

The spelling of 66931460 in words is "sixty-six million, nine hundred thirty-one thousand, four hundred sixty".