64426002660 has 72 divisors (see below), whose sum is σ = 195514123896. Its totient is φ = 17172480000.

The previous prime is 64426002647. The next prime is 64426002677. The reversal of 64426002660 is 6620062446.

64426002660 is a `hidden beast` number, since 6 + 4 + 42 + 600 + 2 + 6 + 6 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 37632896064 + 26793106596 = 193992^2 + 163686^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 322660 + ... + 482660.

It is an arithmetic number, because the mean of its divisors is an integer number (2715473943).

Almost surely, 2^64426002660 is an apocalyptic number.

64426002660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64426002660 is an abundant number, since it is smaller than the sum of its proper divisors (131088121236).

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

64426002660 is a wasteful number, since it uses less digits than its factorization.

64426002660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162253 (or 162248 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The spelling of 64426002660 in words is "sixty-four billion, four hundred twenty-six million, two thousand, six hundred sixty".