82951661 has 4 divisors (see below), whose sum is σ = 89332572. Its totient is φ = 76570752.

The previous prime is 82951621. The next prime is 82951667. The reversal of 82951661 is 16615928.

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 22033636 + 60918025 = 4694^2 + 7805^2 .

It is a cyclic number.

It is not a de Polignac number, because 82951661 - 2¹⁴ = 82935277 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 (82951667) 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, 3190436 + ... + 3190461.

It is an arithmetic number, because the mean of its divisors is an integer number (22333143).

Almost surely, 2^82951661 is an apocalyptic number.

It is an amenable number.

82951661 is a deficient number, since it is larger than the sum of its proper divisors (6380911).

82951661 is a wasteful number, since it uses less digits than its factorization.

82951661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6380910.

The product of its digits is 25920, while the sum is 38.

The square root of 82951661 is about 9107.7802454824. The cubic root of 82951661 is about 436.1223687190.

The spelling of 82951661 in words is "eighty-two million, nine hundred fifty-one thousand, six hundred sixty-one".