1566640070 has 32 divisors (see below), whose sum is σ = 2901618720. Its totient is φ = 608670720.

The previous prime is 1566640069. The next prime is 1566640081. The reversal of 1566640070 is 700466651.

It is a super-2 number, since 2×1566640070² = 4908722217859209800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1566640070.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67766 + ... + 87894.

It is an arithmetic number, because the mean of its divisors is an integer number (90675585).

Almost surely, 2^1566640070 is an apocalyptic number.

1566640070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1566640070 is a deficient number, since it is larger than the sum of its proper divisors (1334978650).

1566640070 is a wasteful number, since it uses less digits than its factorization.

1566640070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20360.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 1566640070 is about 39580.8043121915. The cubic root of 1566640070 is about 1161.4211846869.

The spelling of 1566640070 in words is "one billion, five hundred sixty-six million, six hundred forty thousand, seventy".