25667740 has 48 divisors (see below), whose sum is σ = 62092800. Its totient is φ = 8730432.

The previous prime is 25667737. The next prime is 25667743. The reversal of 25667740 is 4776652.

It is an interprime number because it is at equal distance from previous prime (25667737) and next prime (25667743).

It is a self number, because there is not a number n which added to its sum of digits gives 25667740.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25667743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18801 + ... + 20119.

It is an arithmetic number, because the mean of its divisors is an integer number (1293600).

Almost surely, 2^25667740 is an apocalyptic number.

25667740 is a gapful number since it is divisible by the number (20) 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 25667740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31046400).

25667740 is an abundant number, since it is smaller than the sum of its proper divisors (36425060).

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

25667740 is a wasteful number, since it uses less digits than its factorization.

25667740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474 (or 1472 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 25667740 is about 5066.3339803057. Note that the first 3 decimals coincide. The cubic root of 25667740 is about 294.9822454124.

The spelling of 25667740 in words is "twenty-five million, six hundred sixty-seven thousand, seven hundred forty".