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661166 = 21141733
BaseRepresentation
bin10100001011010101110
31020120221122
42201122232
5132124131
622100542
75422412
oct2413256
91216848
10661166
11411820
1227a752
131a1c2c
14132d42
15d0d7b
hexa16ae

661166 has 16 divisors (see below), whose sum is σ = 1109808. Its totient is φ = 292800.

The previous prime is 661139. The next prime is 661183.

661166 is nontrivially palindromic in base 10.

661166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536 + ... + 1268.

It is an arithmetic number, because the mean of its divisors is an integer number (69363).

2661166 is an apocalyptic number.

661166 is a deficient number, since it is larger than the sum of its proper divisors (448642).

661166 is a wasteful number, since it uses less digits than its factorization.

661166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787.

The product of its digits is 1296, while the sum is 26.

The square root of 661166 is about 813.1211471853. The cubic root of 661166 is about 87.1171188753.

Multiplying 661166 by its sum of digits (26), we get a triangular number (17190316 = T5863).

The spelling of 661166 in words is "six hundred sixty-one thousand, one hundred sixty-six".

Divisors: 1 2 11 22 41 82 451 733 902 1466 8063 16126 30053 60106 330583 661166