1212799247666 has 8 divisors (see below), whose sum is σ = 1830359601264. Its totient is φ = 602679380580.

The previous prime is 1212799247651. The next prime is 1212799247713. The reversal of 1212799247666 is 6667429972121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1212799247599 and 1212799247608.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1860121220 + ... + 1860121871.

It is an arithmetic number, because the mean of its divisors is an integer number (228794950158).

Almost surely, 2^{1212799247666} is an apocalyptic number.

1212799247666 is a deficient number, since it is larger than the sum of its proper divisors (617560353598).

1212799247666 is a wasteful number, since it uses less digits than its factorization.

1212799247666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720243256.

The product of its digits is 27433728, while the sum is 62.

The spelling of 1212799247666 in words is "one trillion, two hundred twelve billion, seven hundred ninety-nine million, two hundred forty-seven thousand, six hundred sixty-six".