61864668 has 24 divisors (see below), whose sum is σ = 160390160. Its totient is φ = 20621520.

The previous prime is 61864667. The next prime is 61864697. The reversal of 61864668 is 86646816.

61864668 is a `hidden beast` number, since 6 + 186 + 466 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61864667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286303 + ... + 286518.

Almost surely, 2^61864668 is an apocalyptic number.

It is an amenable number.

61864668 is an abundant number, since it is smaller than the sum of its proper divisors (98525492).

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

61864668 is a wasteful number, since it uses less digits than its factorization.

61864668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572834 (or 572826 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 61864668 is about 7865.4095888263. The cubic root of 61864668 is about 395.5009783982.

The spelling of 61864668 in words is "sixty-one million, eight hundred sixty-four thousand, six hundred sixty-eight".