1426643566 has 4 divisors (see below), whose sum is σ = 2139965352. Its totient is φ = 713321782.

The previous prime is 1426643527. The next prime is 1426643639. The reversal of 1426643566 is 6653466241.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356660890 + ... + 356660893.

It is an arithmetic number, because the mean of its divisors is an integer number (534991338).

Almost surely, 2^1426643566 is an apocalyptic number.

1426643566 is a deficient number, since it is larger than the sum of its proper divisors (713321786).

1426643566 is an equidigital number, since it uses as much as digits as its factorization.

1426643566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713321785.

The product of its digits is 622080, while the sum is 43.

The square root of 1426643566 is about 37770.9354663080. The cubic root of 1426643566 is about 1125.7410271102.

It can be divided in two parts, 14266435 and 66, that multiplied together give a triangular number (941584710 = T₄₃₃₉₅).

The spelling of 1426643566 in words is "one billion, four hundred twenty-six million, six hundred forty-three thousand, five hundred sixty-six".