1666722350 has 24 divisors (see below), whose sum is σ = 3183893688. Its totient is φ = 648669600.

The previous prime is 1666722289. The next prime is 1666722353. The reversal of 1666722350 is 532276661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1666722353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 448616 + ... + 452315.

It is an arithmetic number, because the mean of its divisors is an integer number (132662237).

Almost surely, 2^1666722350 is an apocalyptic number.

1666722350 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1666722350 is a deficient number, since it is larger than the sum of its proper divisors (1517171338).

1666722350 is a wasteful number, since it uses less digits than its factorization.

1666722350 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900980 (or 900975 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The square root of 1666722350 is about 40825.5110194594. The cubic root of 1666722350 is about 1185.6443053280.

The spelling of 1666722350 in words is "one billion, six hundred sixty-six million, seven hundred twenty-two thousand, three hundred fifty".