661196683 has 8 divisors (see below), whose sum is σ = 755917568. Its totient is φ = 566541864.

The previous prime is 661196647. The next prime is 661196687. The reversal of 661196683 is 386691166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-661196683 is a prime.

It is a super-2 number, since 2×661196683² = 874362107220404978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (661196687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7210 + ... + 37072.

It is an arithmetic number, because the mean of its divisors is an integer number (94489696).

Almost surely, 2^661196683 is an apocalyptic number.

661196683 is a deficient number, since it is larger than the sum of its proper divisors (94720885).

661196683 is a wasteful number, since it uses less digits than its factorization.

661196683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33033.

The product of its digits is 279936, while the sum is 46.

The square root of 661196683 is about 25713.7450209027. The cubic root of 661196683 is about 871.1846648096.

The spelling of 661196683 in words is "six hundred sixty-one million, one hundred ninety-six thousand, six hundred eighty-three".