25497966 has 32 divisors (see below), whose sum is σ = 55550880. Its totient is φ = 7755264.

The previous prime is 25497949. The next prime is 25497973. The reversal of 25497966 is 66979452.

Its product of digits (816480) is a multiple of the sum of its prime divisors (3780).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5106 + ... + 8778.

It is an arithmetic number, because the mean of its divisors is an integer number (1735965).

Almost surely, 2^25497966 is an apocalyptic number.

25497966 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25497966, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27775440).

25497966 is an abundant number, since it is smaller than the sum of its proper divisors (30052914).

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

25497966 is a wasteful number, since it uses less digits than its factorization.

25497966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3780.

The product of its digits is 816480, while the sum is 48.

The square root of 25497966 is about 5049.5510691546. The cubic root of 25497966 is about 294.3304397010.

The spelling of 25497966 in words is "twenty-five million, four hundred ninety-seven thousand, nine hundred sixty-six".