1245936666 has 32 divisors (see below), whose sum is σ = 2824799040. Its totient is φ = 363187584.

The previous prime is 1245936619. The next prime is 1245936697. The reversal of 1245936666 is 6666395421.

It is a happy number.

It is a Curzon 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, 418875 + ... + 421838.

It is an arithmetic number, because the mean of its divisors is an integer number (88274970).

Almost surely, 2^1245936666 is an apocalyptic number.

1245936666 is an abundant number, since it is smaller than the sum of its proper divisors (1578862374).

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

1245936666 is a wasteful number, since it uses less digits than its factorization.

1245936666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840750.

The product of its digits is 1399680, while the sum is 48.

The square root of 1245936666 is about 35297.8280634942. The cubic root of 1245936666 is about 1076.0488529433.

The spelling of 1245936666 in words is "one billion, two hundred forty-five million, nine hundred thirty-six thousand, six hundred sixty-six".