625011660 has 576 divisors, whose sum is σ = 2574028800. Its totient is φ = 124540416.

The previous prime is 625011623. The next prime is 625011661. The reversal of 625011660 is 66110526.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (625011661) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 7911501 + ... + 7911579.

It is an arithmetic number, because the mean of its divisors is an integer number (4468800).

Almost surely, 2^625011660 is an apocalyptic number.

625011660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625011660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287014400).

625011660 is an abundant number, since it is smaller than the sum of its proper divisors (1949017140).

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

625011660 is a wasteful number, since it uses less digits than its factorization.

625011660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 625011660 is about 25000.2331989124. The cubic root of 625011660 is about 854.9932901905.

The spelling of 625011660 in words is "six hundred twenty-five million, eleven thousand, six hundred sixty".