667928099520 has 560 divisors, whose sum is σ = 2647132697088. Its totient is φ = 158473635840.

The previous prime is 667928099497. The next prime is 667928099551. The reversal of 667928099520 is 25990829766.

It is a super-2 number, since 2×667928099520² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13375719 + ... + 13425561.

Almost surely, 2^667928099520 is an apocalyptic number.

667928099520 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 667928099520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323566348544).

667928099520 is an abundant number, since it is smaller than the sum of its proper divisors (1979204597568).

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

667928099520 is a wasteful number, since it uses less digits than its factorization.

667928099520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49930 (or 49911 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 667928099520 in words is "six hundred sixty-seven billion, nine hundred twenty-eight million, ninety-nine thousand, five hundred twenty".