1226355666 has 16 divisors (see below), whose sum is σ = 2454378624. Its totient is φ = 408507344.

The previous prime is 1226355643. The next prime is 1226355677. The reversal of 1226355666 is 6665536221.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59805 + ... + 77648.

It is an arithmetic number, because the mean of its divisors is an integer number (153398664).

Almost surely, 2^1226355666 is an apocalyptic number.

1226355666 is an abundant number, since it is smaller than the sum of its proper divisors (1228022958).

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

1226355666 is a wasteful number, since it uses less digits than its factorization.

1226355666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138945.

The product of its digits is 388800, while the sum is 42.

The square root of 1226355666 is about 35019.3613019998. The cubic root of 1226355666 is about 1070.3820413506.

The spelling of 1226355666 in words is "one billion, two hundred twenty-six million, three hundred fifty-five thousand, six hundred sixty-six".