660369380 has 48 divisors (see below), whose sum is σ = 1514600640. Its totient is φ = 239856000.

The previous prime is 660369373. The next prime is 660369383. The reversal of 660369380 is 83963066.

It is a super-3 number, since 3×660369380³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (660369383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346430 + ... + 348330.

It is an arithmetic number, because the mean of its divisors is an integer number (31554180).

Almost surely, 2^660369380 is an apocalyptic number.

It is an amenable number.

660369380 is an abundant number, since it is smaller than the sum of its proper divisors (854231260).

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

660369380 is a wasteful number, since it uses less digits than its factorization.

660369380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3500 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 660369380 is about 25697.6532002438. The cubic root of 660369380 is about 870.8211650556.

The spelling of 660369380 in words is "six hundred sixty million, three hundred sixty-nine thousand, three hundred eighty".