661460012 has 6 divisors (see below), whose sum is σ = 1157555028. Its totient is φ = 330730004.

The previous prime is 661459993. The next prime is 661460017. The reversal of 661460012 is 210064166.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (661460017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82682498 + ... + 82682505.

It is an arithmetic number, because the mean of its divisors is an integer number (192925838).

Almost surely, 2^661460012 is an apocalyptic number.

It is an amenable number.

661460012 is a deficient number, since it is larger than the sum of its proper divisors (496095016).

661460012 is a wasteful number, since it uses less digits than its factorization.

661460012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165365007 (or 165365005 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 661460012 is about 25718.8649049681. The cubic root of 661460012 is about 871.3003024832.

The spelling of 661460012 in words is "six hundred sixty-one million, four hundred sixty thousand, twelve".