25162661 has 4 divisors (see below), whose sum is σ = 25217472. Its totient is φ = 25107852.

The previous prime is 25162649. The next prime is 25162663. The reversal of 25162661 is 16626152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25162661 - 2¹⁰ = 25161637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25162663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26711 + ... + 27636.

It is an arithmetic number, because the mean of its divisors is an integer number (6304368).

Almost surely, 2^25162661 is an apocalyptic number.

It is an amenable number.

25162661 is a deficient number, since it is larger than the sum of its proper divisors (54811).

25162661 is an equidigital number, since it uses as much as digits as its factorization.

25162661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54810.

The product of its digits is 4320, while the sum is 29.

The square root of 25162661 is about 5016.2397271263. The cubic root of 25162661 is about 293.0345682520.

The spelling of 25162661 in words is "twenty-five million, one hundred sixty-two thousand, six hundred sixty-one".