1245153666 has 32 divisors (see below), whose sum is σ = 2555961408. Its totient is φ = 404167680.

The previous prime is 1245153659. The next prime is 1245153703. The reversal of 1245153666 is 6663515421.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79786 + ... + 94106.

It is an arithmetic number, because the mean of its divisors is an integer number (79873794).

Almost surely, 2^1245153666 is an apocalyptic number.

1245153666 is an abundant number, since it is smaller than the sum of its proper divisors (1310807742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1245153666 is a wasteful number, since it uses less digits than its factorization.

1245153666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14706.

The product of its digits is 129600, while the sum is 39.

The square root of 1245153666 is about 35286.7349863940. The cubic root of 1245153666 is about 1075.8233939683.

The spelling of 1245153666 in words is "one billion, two hundred forty-five million, one hundred fifty-three thousand, six hundred sixty-six".