667852980540 has 36 divisors (see below), whose sum is σ = 1870006070184. Its totient is φ = 178092440096.

The previous prime is 667852980499. The next prime is 667852980547. The reversal of 667852980540 is 45089258766.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667852980547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6277429 + ... + 6382931.

Almost surely, 2^667852980540 is an apocalyptic number.

667852980540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667852980540 is an abundant number, since it is smaller than the sum of its proper divisors (1202153089644).

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

667852980540 is an frugal number, since it uses more digits than its factorization.

667852980540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211018 (or 105513 counting only the distinct ones).

The product of its (nonzero) digits is 29030400, while the sum is 60.

Multiplying 667852980540 by its sum of digits (60), we get a square (40071178832400 = 6330180²).

667852980540 divided by its sum of digits (60) gives a square (11130883009 = 105503²).

The spelling of 667852980540 in words is "six hundred sixty-seven billion, eight hundred fifty-two million, nine hundred eighty thousand, five hundred forty".