690930691663 has 4 divisors (see below), whose sum is σ = 692050515120. Its totient is φ = 689810868208.

The previous prime is 690930691643. The next prime is 690930691681. The reversal of 690930691663 is 366196039096.

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

It is a cyclic number.

It is not a de Polignac number, because 690930691663 - 2⁵ = 690930691631 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 690930691598 and 690930691607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690930691643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 559910803 + ... + 559912036.

It is an arithmetic number, because the mean of its divisors is an integer number (173012628780).

Almost surely, 2^690930691663 is an apocalyptic number.

690930691663 is a deficient number, since it is larger than the sum of its proper divisors (1119823457).

690930691663 is a wasteful number, since it uses less digits than its factorization.

690930691663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1119823456.

The product of its (nonzero) digits is 8503056, while the sum is 58.

The spelling of 690930691663 in words is "six hundred ninety billion, nine hundred thirty million, six hundred ninety-one thousand, six hundred sixty-three".