667233050728 has 64 divisors (see below), whose sum is σ = 1383139281600. Its totient is φ = 300331207680.

The previous prime is 667233050717. The next prime is 667233050741. The reversal of 667233050728 is 827050332766.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 368538 + ... + 1212553.

It is an arithmetic number, because the mean of its divisors is an integer number (21611551275).

Almost surely, 2^667233050728 is an apocalyptic number.

667233050728 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

667233050728 is an abundant number, since it is smaller than the sum of its proper divisors (715906230872).

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

667233050728 is a wasteful number, since it uses less digits than its factorization.

667233050728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1581250 (or 1581246 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 49.

The spelling of 667233050728 in words is "six hundred sixty-seven billion, two hundred thirty-three million, fifty thousand, seven hundred twenty-eight".