841661604 has 72 divisors (see below), whose sum is σ = 2521541568. Its totient is φ = 240472800.

The previous prime is 841661593. The next prime is 841661617. The reversal of 841661604 is 406166148.

841661604 is a `hidden beast` number, since 8 + 41 + 6 + 6 + 1 + 604 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55047 + ... + 68654.

Almost surely, 2^841661604 is an apocalyptic number.

841661604 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

841661604 is an abundant number, since it is smaller than the sum of its proper divisors (1679879964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

841661604 is a wasteful number, since it uses less digits than its factorization.

841661604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123727 (or 123713 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 841661604 is about 29011.4047229706. The cubic root of 841661604 is about 944.1605243273.

The spelling of 841661604 in words is "eight hundred forty-one million, six hundred sixty-one thousand, six hundred four".