98501661 has 24 divisors (see below), whose sum is σ = 148992480. Its totient is φ = 62625696.

The previous prime is 98501647. The next prime is 98501701. The reversal of 98501661 is 16610589.

98501661 is a `hidden beast` number, since 98 + 501 + 6 + 61 = 666.

It is not a de Polignac number, because 98501661 - 2⁵ = 98501629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98501461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19390 + ... + 23936.

It is an arithmetic number, because the mean of its divisors is an integer number (6208020).

Almost surely, 2^98501661 is an apocalyptic number.

It is an amenable number.

98501661 is a deficient number, since it is larger than the sum of its proper divisors (50490819).

98501661 is a wasteful number, since it uses less digits than its factorization.

98501661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4665 (or 4662 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 98501661 is about 9924.8003002579. The cubic root of 98501661 is about 461.8289831978.

It can be divided in two parts, 9850 and 1661, that added together give a palindrome (11511).

The spelling of 98501661 in words is "ninety-eight million, five hundred one thousand, six hundred sixty-one".