103556666 has 4 divisors (see below), whose sum is σ = 155335002. Its totient is φ = 51778332.

The previous prime is 103556591. The next prime is 103556683. The reversal of 103556666 is 666655301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 103327225 + 229441 = 10165^2 + 479^2 .

It is a super-3 number, since 3×103556666³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25889165 + ... + 25889168.

Almost surely, 2^103556666 is an apocalyptic number.

103556666 is a deficient number, since it is larger than the sum of its proper divisors (51778336).

103556666 is an equidigital number, since it uses as much as digits as its factorization.

103556666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51778335.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 103556666 is about 10176.2795755620. The cubic root of 103556666 is about 469.5977635964.

The spelling of 103556666 in words is "one hundred three million, five hundred fifty-six thousand, six hundred sixty-six".