60661640 has 32 divisors (see below), whose sum is σ = 146989080. Its totient is φ = 22397952.

The previous prime is 60661639. The next prime is 60661681. The reversal of 60661640 is 4616606.

It can be written as a sum of positive squares in 4 ways, for example, as 15476356 + 45185284 = 3934^2 + 6722^2 .

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, 57809 + ... + 58848.

Almost surely, 2^60661640 is an apocalyptic number.

It is an amenable number.

60661640 is an abundant number, since it is smaller than the sum of its proper divisors (86327440).

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

60661640 is a wasteful number, since it uses less digits than its factorization.

60661640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116681 (or 116677 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 60661640 is about 7788.5582748029. The cubic root of 60661640 is about 392.9205251219.

The spelling of 60661640 in words is "sixty million, six hundred sixty-one thousand, six hundred forty".