66431403316460 has 48 divisors (see below), whose sum is σ = 171699627038016. Its totient is φ = 21024444125952.

The previous prime is 66431403316403. The next prime is 66431403316463. The reversal of 66431403316460 is 6461330413466.

It is not an unprimeable number, because it can be changed into a prime (66431403316463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18250383707 + ... + 18250387346.

It is an arithmetic number, because the mean of its divisors is an integer number (3577075563292).

Almost surely, 2^{66431403316460} is an apocalyptic number.

It is an amenable number.

66431403316460 is an abundant number, since it is smaller than the sum of its proper divisors (105268223721556).

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

66431403316460 is a wasteful number, since it uses less digits than its factorization.

66431403316460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36500771082 (or 36500771080 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 47.

The spelling of 66431403316460 in words is "sixty-six trillion, four hundred thirty-one billion, four hundred three million, three hundred sixteen thousand, four hundred sixty".