1640967066 has 16 divisors (see below), whose sum is σ = 3646593600. Its totient is φ = 546989004.

The previous prime is 1640967043. The next prime is 1640967103. The reversal of 1640967066 is 6607690461.

It is a happy number.

It is a super-3 number, since 3×1640967066³ (a number of 29 digits) contains 333 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15194086 + ... + 15194193.

It is an arithmetic number, because the mean of its divisors is an integer number (227912100).

Almost surely, 2^1640967066 is an apocalyptic number.

1640967066 is an abundant number, since it is smaller than the sum of its proper divisors (2005626534).

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

1640967066 is a wasteful number, since it uses less digits than its factorization.

1640967066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30388290 (or 30388284 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 1640967066 is about 40508.8516993508. The cubic root of 1640967066 is about 1179.5054582825.

The spelling of 1640967066 in words is "one billion, six hundred forty million, nine hundred sixty-seven thousand, sixty-six".