901997066 has 4 divisors (see below), whose sum is σ = 1352995602. Its totient is φ = 450998532.

The previous prime is 901996967. The next prime is 901997071. The reversal of 901997066 is 660799109.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 859369225 + 42627841 = 29315^2 + 6529^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 901997066.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225499265 + ... + 225499268.

Almost surely, 2^901997066 is an apocalyptic number.

901997066 is a deficient number, since it is larger than the sum of its proper divisors (450998536).

901997066 is a wasteful number, since it uses less digits than its factorization.

901997066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450998535.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 901997066 is about 30033.2659895656. The cubic root of 901997066 is about 966.2029852048.

The spelling of 901997066 in words is "nine hundred one million, nine hundred ninety-seven thousand, sixty-six".