662968091 has 4 divisors (see below), whose sum is σ = 701966232. Its totient is φ = 623969952.

The previous prime is 662968081. The next prime is 662968127. The reversal of 662968091 is 190869266.

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 662968091 - 2⁶ = 662968027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662968051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19499045 + ... + 19499078.

It is an arithmetic number, because the mean of its divisors is an integer number (175491558).

Almost surely, 2^662968091 is an apocalyptic number.

662968091 is a deficient number, since it is larger than the sum of its proper divisors (38998141).

662968091 is a wasteful number, since it uses less digits than its factorization.

662968091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38998140.

The product of its (nonzero) digits is 279936, while the sum is 47.

The square root of 662968091 is about 25748.1667502756. The cubic root of 662968091 is about 871.9619662415.

The spelling of 662968091 in words is "six hundred sixty-two million, nine hundred sixty-eight thousand, ninety-one".