11661602 has 4 divisors (see below), whose sum is σ = 17492406. Its totient is φ = 5830800.

The previous prime is 11661571. The next prime is 11661607. The reversal of 11661602 is 20616611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20616611 = 389 ⋅52999.

It can be written as a sum of positive squares in only one way, i.e., 8532241 + 3129361 = 2921^2 + 1769^2 .

It is a super-2 number, since 2×11661602² = 271985922412808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11661607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2915399 + ... + 2915402.

Almost surely, 2^11661602 is an apocalyptic number.

11661602 is a deficient number, since it is larger than the sum of its proper divisors (5830804).

11661602 is an equidigital number, since it uses as much as digits as its factorization.

11661602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830803.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 11661602 is about 3414.9087835548. The cubic root of 11661602 is about 226.7702462972.

The spelling of 11661602 in words is "eleven million, six hundred sixty-one thousand, six hundred two".