667652131500540 has 48 divisors (see below), whose sum is σ = 1869437200262688. Its totient is φ = 178039498680064.

The previous prime is 667652131500539. The next prime is 667652131500559. The reversal of 667652131500540 is 45005131256766.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23334147 + ... + 43356506.

It is an arithmetic number, because the mean of its divisors is an integer number (38946608338806).

Almost surely, 2^{667652131500540} is an apocalyptic number.

667652131500540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667652131500540 is an abundant number, since it is smaller than the sum of its proper divisors (1201785068762148).

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

667652131500540 is a wasteful number, since it uses less digits than its factorization.

667652131500540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66857518 (or 66857516 counting only the distinct ones).

The product of its (nonzero) digits is 4536000, while the sum is 51.

The spelling of 667652131500540 in words is "six hundred sixty-seven trillion, six hundred fifty-two billion, one hundred thirty-one million, five hundred thousand, five hundred forty".