615667 has 6 divisors (see below), whose sum is σ = 666852. Its totient is φ = 568152.

The previous prime is 615661. The next prime is 615677. The reversal of 615667 is 766516.

It is not a de Polignac number, because 615667 - 2⁷ = 615539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (615661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1653 + ... + 1990.

It is an arithmetic number, because the mean of its divisors is an integer number (111142).

2⁶¹⁵⁶⁶⁷ is an apocalyptic number.

615667 is a deficient number, since it is larger than the sum of its proper divisors (51185).

615667 is a wasteful number, since it uses less digits than its factorization.

615667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669 (or 3656 counting only the distinct ones).

The product of its digits is 7560, while the sum is 31.

The square root of 615667 is about 784.6445054928. The cubic root of 615667 is about 85.0710824083.

The spelling of 615667 in words is "six hundred fifteen thousand, six hundred sixty-seven".