113621666 has 4 divisors (see below), whose sum is σ = 170432502. Its totient is φ = 56810832.

The previous prime is 113621663. The next prime is 113621687. The reversal of 113621666 is 666126311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 666126311 = 1301 ⋅512011.

It can be written as a sum of positive squares in only one way, i.e., 66080641 + 47541025 = 8129^2 + 6895^2 .

It is not an unprimeable number, because it can be changed into a prime (113621663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28405415 + ... + 28405418.

Almost surely, 2^113621666 is an apocalyptic number.

113621666 is a deficient number, since it is larger than the sum of its proper divisors (56810836).

113621666 is an equidigital number, since it uses as much as digits as its factorization.

113621666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56810835.

The product of its digits is 7776, while the sum is 32.

The square root of 113621666 is about 10659.3464152358. The cubic root of 113621666 is about 484.3437697298.

Adding to 113621666 its reverse (666126311), we get a palindrome (779747977).

The spelling of 113621666 in words is "one hundred thirteen million, six hundred twenty-one thousand, six hundred sixty-six".