660470420 has 24 divisors (see below), whose sum is σ = 1405990824. Its totient is φ = 260568576.

The previous prime is 660470399. The next prime is 660470443. The reversal of 660470420 is 24074066.

It can be written as a sum of positive squares in 4 ways, for example, as 84566416 + 575904004 = 9196^2 + 23998^2 .

It is a super-3 number, since 3×660470420³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224729 + ... + 227648.

It is an arithmetic number, because the mean of its divisors is an integer number (58582951).

Almost surely, 2^660470420 is an apocalyptic number.

It is an amenable number.

660470420 is an abundant number, since it is smaller than the sum of its proper divisors (745520404).

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

660470420 is a wasteful number, since it uses less digits than its factorization.

660470420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452459 (or 452457 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 660470420 is about 25699.6190633247. The cubic root of 660470420 is about 870.8655762019.

The spelling of 660470420 in words is "six hundred sixty million, four hundred seventy thousand, four hundred twenty".