660101538 has 64 divisors (see below), whose sum is σ = 1437004800. Its totient is φ = 201626880.

The previous prime is 660101537. The next prime is 660101581. The reversal of 660101538 is 835101066.

It is not an unprimeable number, because it can be changed into a prime (660101537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 284728 + ... + 287036.

It is an arithmetic number, because the mean of its divisors is an integer number (22453200).

Almost surely, 2^660101538 is an apocalyptic number.

660101538 is an abundant number, since it is smaller than the sum of its proper divisors (776903262).

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

660101538 is a wasteful number, since it uses less digits than its factorization.

660101538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2427.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 660101538 is about 25692.4412619743. The cubic root of 660101538 is about 870.7034157926.

The spelling of 660101538 in words is "six hundred sixty million, one hundred one thousand, five hundred thirty-eight".