661005098 has 32 divisors (see below), whose sum is σ = 1131009600. Its totient is φ = 287214336.

The previous prime is 661005097. The next prime is 661005109. The reversal of 661005098 is 890500166.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (661005097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76418 + ... + 84626.

It is an arithmetic number, because the mean of its divisors is an integer number (35344050).

Almost surely, 2^661005098 is an apocalyptic number.

661005098 is a deficient number, since it is larger than the sum of its proper divisors (470004502).

661005098 is a wasteful number, since it uses less digits than its factorization.

661005098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8406.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 661005098 is about 25710.0194087830. The cubic root of 661005098 is about 871.1005133302.

The spelling of 661005098 in words is "six hundred sixty-one million, five thousand, ninety-eight".