82726661 has 4 divisors (see below), whose sum is σ = 82751232. Its totient is φ = 82702092.

The previous prime is 82726649. The next prime is 82726663. The reversal of 82726661 is 16662728.

It is a happy number.

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 82726661 - 2¹⁸ = 82464517 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 (82726663) 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, 6245 + ... + 14298.

It is an arithmetic number, because the mean of its divisors is an integer number (20687808).

Almost surely, 2^82726661 is an apocalyptic number.

It is an amenable number.

82726661 is a deficient number, since it is larger than the sum of its proper divisors (24571).

82726661 is a wasteful number, since it uses less digits than its factorization.

82726661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24570.

The product of its digits is 48384, while the sum is 38.

The square root of 82726661 is about 9095.4197814065. The cubic root of 82726661 is about 435.7276955369.

The spelling of 82726661 in words is "eighty-two million, seven hundred twenty-six thousand, six hundred sixty-one".