525666740 has 24 divisors (see below), whose sum is σ = 1130826312. Its totient is φ = 205137920.

The previous prime is 525666737. The next prime is 525666761. The reversal of 525666740 is 47666525.

It can be written as a sum of positive squares in 4 ways, for example, as 39287824 + 486378916 = 6268^2 + 22054^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

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, 319709 + ... + 321348.

It is an arithmetic number, because the mean of its divisors is an integer number (47117763).

Almost surely, 2^525666740 is an apocalyptic number.

It is an amenable number.

525666740 is an abundant number, since it is smaller than the sum of its proper divisors (605159572).

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

525666740 is a wasteful number, since it uses less digits than its factorization.

525666740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641107 (or 641105 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 41.

The square root of 525666740 is about 22927.4233179396. The cubic root of 525666740 is about 807.0556824878.

The spelling of 525666740 in words is "five hundred twenty-five million, six hundred sixty-six thousand, seven hundred forty".