6450660 has 36 divisors (see below), whose sum is σ = 19567548. Its totient is φ = 1720128.

The previous prime is 6450641. The next prime is 6450679. The reversal of 6450660 is 660546.

It is an interprime number because it is at equal distance from previous prime (6450641) and next prime (6450679).

It can be written as a sum of positive squares in 2 ways, for example, as 2090916 + 4359744 = 1446^2 + 2088^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6450660² = 83222028871200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17739 + ... + 18098.

It is an arithmetic number, because the mean of its divisors is an integer number (543543).

Almost surely, 2^6450660 is an apocalyptic number.

6450660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6450660 is an abundant number, since it is smaller than the sum of its proper divisors (13116888).

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

6450660 is a wasteful number, since it uses less digits than its factorization.

6450660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35852 (or 35847 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 6450660 is about 2539.8149538894. The cubic root of 6450660 is about 186.1521474489.

The spelling of 6450660 in words is "six million, four hundred fifty thousand, six hundred sixty".