84680661 has 12 divisors (see below), whose sum is σ = 122261568. Its totient is φ = 52110864.

The previous prime is 84680639. The next prime is 84680677. The reversal of 84680661 is 16608648.

It is not a de Polignac number, because 84680661 - 2⁶ = 84680597 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84680611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83005 + ... + 84018.

It is an arithmetic number, because the mean of its divisors is an integer number (10188464).

Almost surely, 2^84680661 is an apocalyptic number.

It is an amenable number.

84680661 is a deficient number, since it is larger than the sum of its proper divisors (37580907).

84680661 is a wasteful number, since it uses less digits than its factorization.

84680661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167052 (or 167039 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 84680661 is about 9202.2095716192. The cubic root of 84680661 is about 439.1316569366.

The spelling of 84680661 in words is "eighty-four million, six hundred eighty thousand, six hundred sixty-one".