665741139 has 32 divisors (see below), whose sum is σ = 1052352000. Its totient is φ = 366288384.

The previous prime is 665741107. The next prime is 665741159. The reversal of 665741139 is 931147566.

It is not a de Polignac number, because 665741139 - 2⁵ = 665741107 is a prime.

It is a super-2 number, since 2×665741139² = 886422528314034642, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 665741139.

It is not an unprimeable number, because it can be changed into a prime (665741159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 253867 + ... + 256475.

It is an arithmetic number, because the mean of its divisors is an integer number (32886000).

Almost surely, 2^665741139 is an apocalyptic number.

665741139 is a deficient number, since it is larger than the sum of its proper divisors (386610861).

665741139 is a wasteful number, since it uses less digits than its factorization.

665741139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3067.

The product of its digits is 136080, while the sum is 42.

The square root of 665741139 is about 25801.9599836912. The cubic root of 665741139 is about 873.1760160697.

The spelling of 665741139 in words is "six hundred sixty-five million, seven hundred forty-one thousand, one hundred thirty-nine".