523651966 has 4 divisors (see below), whose sum is σ = 785477952. Its totient is φ = 261825982.

The previous prime is 523651939. The next prime is 523651987. The reversal of 523651966 is 669156325.

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

It is a super-2 number, since 2×523651966² = 548422762991330312, which contains 22 as substring.

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 as a sum of consecutive naturals, namely, 130912990 + ... + 130912993.

It is an arithmetic number, because the mean of its divisors is an integer number (196369488).

Almost surely, 2^523651966 is an apocalyptic number.

523651966 is a deficient number, since it is larger than the sum of its proper divisors (261825986).

523651966 is a wasteful number, since it uses less digits than its factorization.

523651966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261825985.

The product of its digits is 291600, while the sum is 43.

The square root of 523651966 is about 22883.4430538763. The cubic root of 523651966 is about 806.0232687694.

The spelling of 523651966 in words is "five hundred twenty-three million, six hundred fifty-one thousand, nine hundred sixty-six".