1660664610 has 192 divisors, whose sum is σ = 4851010944. Its totient is φ = 390758400.

The previous prime is 1660664591. The next prime is 1660664627. The reversal of 1660664610 is 164660661.

1660664610 is a `hidden beast` number, since 1 + 6 + 6 + 0 + 6 + 646 + 1 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6461602 + ... + 6461858.

It is an arithmetic number, because the mean of its divisors is an integer number (25265682).

Almost surely, 2^1660664610 is an apocalyptic number.

1660664610 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1660664610, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2425505472).

1660664610 is an abundant number, since it is smaller than the sum of its proper divisors (3190346334).

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

1660664610 is a wasteful number, since it uses less digits than its factorization.

1660664610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1660664610 is about 40751.2528641758. The cubic root of 1660664610 is about 1184.2061445795.

The spelling of 1660664610 in words is "one billion, six hundred sixty million, six hundred sixty-four thousand, six hundred ten".