667611148324780 has 48 divisors (see below), whose sum is σ = 1529467545279744. Its totient is φ = 242762754365120.

The previous prime is 667611148324741. The next prime is 667611148324787. The reversal of 667611148324780 is 87423841116766.

It is not an unprimeable number, because it can be changed into a prime (667611148324787) 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, 19995922 + ... + 41654041.

It is an arithmetic number, because the mean of its divisors is an integer number (31863907193328).

Almost surely, 2^{667611148324780} is an apocalyptic number.

It is an amenable number.

667611148324780 is an abundant number, since it is smaller than the sum of its proper divisors (861856396954964).

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

667611148324780 is a wasteful number, since it uses less digits than its factorization.

667611148324780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61699206 (or 61699204 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 64.

The spelling of 667611148324780 in words is "six hundred sixty-seven trillion, six hundred eleven billion, one hundred forty-eight million, three hundred twenty-four thousand, seven hundred eighty".