667215827380 has 24 divisors (see below), whose sum is σ = 1410077787048. Its totient is φ = 265186416768.

The previous prime is 667215827371. The next prime is 667215827381. The reversal of 667215827380 is 83728512766.

It can be written as a sum of positive squares in 4 ways, for example, as 20790179344 + 646425648036 = 144188^2 + 804006^2 .

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667215827381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106241419 + ... + 106247698.

It is an arithmetic number, because the mean of its divisors is an integer number (58753241127).

Almost surely, 2^667215827380 is an apocalyptic number.

It is an amenable number.

667215827380 is an abundant number, since it is smaller than the sum of its proper divisors (742861959668).

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

667215827380 is a wasteful number, since it uses less digits than its factorization.

667215827380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212489283 (or 212489281 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 55.

The spelling of 667215827380 in words is "six hundred sixty-seven billion, two hundred fifteen million, eight hundred twenty-seven thousand, three hundred eighty".