690782021334 has 24 divisors (see below), whose sum is σ = 1497199623192. Its totient is φ = 230182944000.

The previous prime is 690782021309. The next prime is 690782021393. The reversal of 690782021334 is 433120287096.

It is a super-2 number, since 2×690782021334² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 690782021334.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6422667 + ... + 6529334.

It is an arithmetic number, because the mean of its divisors is an integer number (62383317633).

Almost surely, 2^690782021334 is an apocalyptic number.

690782021334 is an abundant number, since it is smaller than the sum of its proper divisors (806417601858).

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

690782021334 is a wasteful number, since it uses less digits than its factorization.

690782021334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12954972 (or 12954969 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The spelling of 690782021334 in words is "six hundred ninety billion, seven hundred eighty-two million, twenty-one thousand, three hundred thirty-four".