60640664 has 32 divisors (see below), whose sum is σ = 132971520. Its totient is φ = 25383456.

The previous prime is 60640663. The next prime is 60640667. The reversal of 60640664 is 46604606.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 60640664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60640663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10184 + ... + 14999.

It is an arithmetic number, because the mean of its divisors is an integer number (4155360).

Almost surely, 2^60640664 is an apocalyptic number.

It is an amenable number.

60640664 is an abundant number, since it is smaller than the sum of its proper divisors (72330856).

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

60640664 is a wasteful number, since it uses less digits than its factorization.

60640664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25239 (or 25235 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 60640664 is about 7787.2115676923. The cubic root of 60640664 is about 392.8752309783.

The spelling of 60640664 in words is "sixty million, six hundred forty thousand, six hundred sixty-four".