615065661 has 48 divisors (see below), whose sum is σ = 1089938304. Its totient is φ = 326218752.

The previous prime is 615065653. The next prime is 615065707. The reversal of 615065661 is 166560516.

It is not a de Polignac number, because 615065661 - 2³ = 615065653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615065621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74250 + ... + 82116.

It is an arithmetic number, because the mean of its divisors is an integer number (22707048).

Almost surely, 2^615065661 is an apocalyptic number.

It is an amenable number.

615065661 is a deficient number, since it is larger than the sum of its proper divisors (474872643).

615065661 is a wasteful number, since it uses less digits than its factorization.

615065661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970 (or 7967 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 615065661 is about 24800.5173534747. The cubic root of 615065661 is about 850.4337629228.

The spelling of 615065661 in words is "six hundred fifteen million, sixty-five thousand, six hundred sixty-one".