1397229666 has 32 divisors (see below), whose sum is σ = 3195184128. Its totient is φ = 399018960.

The previous prime is 1397229649. The next prime is 1397229667. The reversal of 1397229666 is 6669227931.

It is not an unprimeable number, because it can be changed into a prime (1397229667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98481 + ... + 111771.

It is an arithmetic number, because the mean of its divisors is an integer number (99849504).

Almost surely, 2^1397229666 is an apocalyptic number.

1397229666 is an abundant number, since it is smaller than the sum of its proper divisors (1797954462).

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

1397229666 is a wasteful number, since it uses less digits than its factorization.

1397229666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15806.

The product of its digits is 1469664, while the sum is 51.

The square root of 1397229666 is about 37379.5353903710. The cubic root of 1397229666 is about 1117.9505638751.

The spelling of 1397229666 in words is "one billion, three hundred ninety-seven million, two hundred twenty-nine thousand, six hundred sixty-six".