102026661 has 16 divisors (see below), whose sum is σ = 149188608. Its totient is φ = 61506800.

The previous prime is 102026657. The next prime is 102026677. The reversal of 102026661 is 166620201.

It is a cyclic number.

It is not a de Polignac number, because 102026661 - 2² = 102026657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102026641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1791 + ... + 14396.

It is an arithmetic number, because the mean of its divisors is an integer number (9324288).

Almost surely, 2^102026661 is an apocalyptic number.

102026661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102026661 is a deficient number, since it is larger than the sum of its proper divisors (47161947).

102026661 is a wasteful number, since it uses less digits than its factorization.

102026661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16392.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 102026661 is about 10100.8247683048. The cubic root of 102026661 is about 467.2735780984.

Adding to 102026661 its reverse (166620201), we get a palindrome (268646862).

The spelling of 102026661 in words is "one hundred two million, twenty-six thousand, six hundred sixty-one".