667406022540544 has 108 divisors (see below), whose sum is σ = 1552890011713824. Its totient is φ = 285443816942592.

The previous prime is 667406022540461. The next prime is 667406022540571. The reversal of 667406022540544 is 445045220604766.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48516534 + ... + 60734389.

Almost surely, 2^{667406022540544} is an apocalyptic number.

667406022540544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

667406022540544 is an abundant number, since it is smaller than the sum of its proper divisors (885483989173280).

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

667406022540544 is a wasteful number, since it uses less digits than its factorization.

667406022540544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109251440 (or 109251419 counting only the distinct ones).

The product of its (nonzero) digits is 38707200, while the sum is 55.

The spelling of 667406022540544 in words is "six hundred sixty-seven trillion, four hundred six billion, twenty-two million, five hundred forty thousand, five hundred forty-four".