82660427 has 4 divisors (see below), whose sum is σ = 82701696. Its totient is φ = 82619160.

The previous prime is 82660373. The next prime is 82660433. The reversal of 82660427 is 72406628.

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

It is a cyclic number.

It is not a de Polignac number, because 82660427 - 2¹⁴ = 82644043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82660027) 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, 17468 + ... + 21689.

It is an arithmetic number, because the mean of its divisors is an integer number (20675424).

Almost surely, 2^82660427 is an apocalyptic number.

82660427 is a deficient number, since it is larger than the sum of its proper divisors (41269).

82660427 is a wasteful number, since it uses less digits than its factorization.

82660427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41268.

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 82660427 is about 9091.7779889304. Note that the first 3 decimals coincide. The cubic root of 82660427 is about 435.6113779621.

The spelling of 82660427 in words is "eighty-two million, six hundred sixty thousand, four hundred twenty-seven".