610673661 has 80 divisors (see below), whose sum is σ = 1046485440. Its totient is φ = 351786240.

The previous prime is 610673653. The next prime is 610673663. The reversal of 610673661 is 166376016.

610673661 is a `hidden beast` number, since 610 + 6 + 7 + 36 + 6 + 1 = 666.

It is not a de Polignac number, because 610673661 - 2³ = 610673653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (610673663) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2620801 + ... + 2621033.

It is an arithmetic number, because the mean of its divisors is an integer number (13081068).

Almost surely, 2^610673661 is an apocalyptic number.

It is an amenable number.

610673661 is a deficient number, since it is larger than the sum of its proper divisors (435811779).

610673661 is a wasteful number, since it uses less digits than its factorization.

610673661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 610673661 is about 24711.8121755569. The cubic root of 610673661 is about 848.4046944918.

The spelling of 610673661 in words is "six hundred ten million, six hundred seventy-three thousand, six hundred sixty-one".