662992091 has 4 divisors (see below), whose sum is σ = 663050712. Its totient is φ = 662933472.

The previous prime is 662992079. The next prime is 662992111. The reversal of 662992091 is 190299266.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 662992091 - 2¹⁰ = 662991067 is a prime.

It is a super-4 number, since 4×662992091⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (662994091) 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, 6350 + ... + 36963.

It is an arithmetic number, because the mean of its divisors is an integer number (165762678).

Almost surely, 2^662992091 is an apocalyptic number.

662992091 is a deficient number, since it is larger than the sum of its proper divisors (58621).

662992091 is a wasteful number, since it uses less digits than its factorization.

662992091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58620.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 662992091 is about 25748.6327986555. The cubic root of 662992091 is about 871.9724880323.

The spelling of 662992091 in words is "six hundred sixty-two million, nine hundred ninety-two thousand, ninety-one".