84025661 has 4 divisors (see below), whose sum is σ = 84312732. Its totient is φ = 83738592.

The previous prime is 84025651. The next prime is 84025663. The reversal of 84025661 is 16652048.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 67338436 + 16687225 = 8206^2 + 4085^2 .

It is a cyclic number.

It is not a de Polignac number, because 84025661 - 2⁶ = 84025597 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 (84025663) 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, 143096 + ... + 143681.

It is an arithmetic number, because the mean of its divisors is an integer number (21078183).

Almost surely, 2^84025661 is an apocalyptic number.

It is an amenable number.

84025661 is a deficient number, since it is larger than the sum of its proper divisors (287071).

84025661 is a wasteful number, since it uses less digits than its factorization.

84025661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287070.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 84025661 is about 9166.5512053334. The cubic root of 84025661 is about 437.9965058137.

The spelling of 84025661 in words is "eighty-four million, twenty-five thousand, six hundred sixty-one".