116661601 has 9 divisors (see below), whose sum is σ = 135796401. Its totient is φ = 99930852.

The previous prime is 116661569. The next prime is 116661617. The reversal of 116661601 is 106166611.

The square root of 116661601 is 10801.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 116661601 - 2⁵ = 116661569 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 116661601.

It is not an unprimeable number, because it can be changed into a prime (116661631) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 74836 + ... + 76378.

It is an arithmetic number, because the mean of its divisors is an integer number (15088489).

Almost surely, 2^116661601 is an apocalyptic number.

116661601 is the 10801-st square number.

116661601 is the 5401-st centered octagonal number.

It is an amenable number.

116661601 is a deficient number, since it is larger than the sum of its proper divisors (19134800).

116661601 is an frugal number, since it uses more digits than its factorization.

116661601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3100 (or 1550 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The cubic root of 116661601 is about 488.6253307174.

Multiplying 116661601 by its product of nonzero digits (1296), we get a square (151193434896 = 388836²).

The spelling of 116661601 in words is "one hundred sixteen million, six hundred sixty-one thousand, six hundred one".