836740661 has 8 divisors (see below), whose sum is σ = 847293600. Its totient is φ = 826232400.

The previous prime is 836740657. The next prime is 836740687. The reversal of 836740661 is 166047638.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 836740661 - 2² = 836740657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (836740651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27350 + ... + 49208.

It is an arithmetic number, because the mean of its divisors is an integer number (105911700).

Almost surely, 2^836740661 is an apocalyptic number.

It is an amenable number.

836740661 is a deficient number, since it is larger than the sum of its proper divisors (10552939).

836740661 is a wasteful number, since it uses less digits than its factorization.

836740661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22339.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 836740661 is about 28926.4699021502. The cubic root of 836740661 is about 942.3168520289.

The spelling of 836740661 in words is "eight hundred thirty-six million, seven hundred forty thousand, six hundred sixty-one".