64210660 has 12 divisors (see below), whose sum is σ = 134842428. Its totient is φ = 25684256.

The previous prime is 64210639. The next prime is 64210673. The reversal of 64210660 is 6601246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16434916 + 47775744 = 4054^2 + 6912^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605247 + ... + 1605286.

It is an arithmetic number, because the mean of its divisors is an integer number (11236869).

Almost surely, 2^64210660 is an apocalyptic number.

It is an amenable number.

64210660 is an abundant number, since it is smaller than the sum of its proper divisors (70631768).

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

64210660 is a wasteful number, since it uses less digits than its factorization.

64210660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3210542 (or 3210540 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 64210660 is about 8013.1554334107. The cubic root of 64210660 is about 400.4383943505.

The spelling of 64210660 in words is "sixty-four million, two hundred ten thousand, six hundred sixty".