667651092480 has 728 divisors, whose sum is σ = 2424981197232. Its totient is φ = 176356196352.

The previous prime is 667651092469. The next prime is 667651092539. The reversal of 667651092480 is 84290156766.

667651092480 is a `hidden beast` number, since 6 + 6 + 7 + 65 + 10 + 92 + 480 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 2941194127 + ... + 2941194353.

Almost surely, 2^667651092480 is an apocalyptic number.

667651092480 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 667651092480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1212490598616).

667651092480 is an abundant number, since it is smaller than the sum of its proper divisors (1757330104752).

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

667651092480 is an equidigital number, since it uses as much as digits as its factorization.

667651092480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 434 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 667651092480 in words is "six hundred sixty-seven billion, six hundred fifty-one million, ninety-two thousand, four hundred eighty".