80025661 has 4 divisors (see below), whose sum is σ = 80428000. Its totient is φ = 79623324.

The previous prime is 80025643. The next prime is 80025677. The reversal of 80025661 is 16652008.

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 80025661 - 2¹⁷ = 79894589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80025611) 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, 200871 + ... + 201268.

It is an arithmetic number, because the mean of its divisors is an integer number (20107000).

Almost surely, 2^80025661 is an apocalyptic number.

It is an amenable number.

80025661 is a deficient number, since it is larger than the sum of its proper divisors (402339).

80025661 is a wasteful number, since it uses less digits than its factorization.

80025661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402338.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 80025661 is about 8945.7062884939. The cubic root of 80025661 is about 430.9330038718.

Adding to 80025661 its reverse (16652008), we get a palindrome (96677669).

The spelling of 80025661 in words is "eighty million, twenty-five thousand, six hundred sixty-one".