2451560666 has 4 divisors (see below), whose sum is σ = 3677341002. Its totient is φ = 1225780332.

The previous prime is 2451560609. The next prime is 2451560687. The reversal of 2451560666 is 6660651542.

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., 1618372441 + 833188225 = 40229^2 + 28865^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612890165 + ... + 612890168.

Almost surely, 2^2451560666 is an apocalyptic number.

2451560666 is a deficient number, since it is larger than the sum of its proper divisors (1225780336).

2451560666 is a wasteful number, since it uses less digits than its factorization.

2451560666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225780335.

The product of its (nonzero) digits is 259200, while the sum is 41.

The square root of 2451560666 is about 49513.2372805495. The cubic root of 2451560666 is about 1348.3859385767.

The spelling of 2451560666 in words is "two billion, four hundred fifty-one million, five hundred sixty thousand, six hundred sixty-six".