64116990 has 192 divisors, whose sum is σ = 203673600. Its totient is φ = 13970880.

The previous prime is 64116937. The next prime is 64117003. The reversal of 64116990 is 9961146.

64116990 is a `hidden beast` number, since 641 + 1 + 6 + 9 + 9 + 0 = 666.

It is a super-2 number, since 2×64116990² = 8221976813320200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 956937 + ... + 957003.

It is an arithmetic number, because the mean of its divisors is an integer number (1060800).

Almost surely, 2^64116990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64116990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101836800).

64116990 is an abundant number, since it is smaller than the sum of its proper divisors (139556610).

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

64116990 is a wasteful number, since it uses less digits than its factorization.

64116990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 64116990 is about 8007.3085365808. The cubic root of 64116990 is about 400.2435808075.

The spelling of 64116990 in words is "sixty-four million, one hundred sixteen thousand, nine hundred ninety".