661970833334 has 4 divisors (see below), whose sum is σ = 992956250004. Its totient is φ = 330985416666.

The previous prime is 661970833333. The next prime is 661970833339. The reversal of 661970833334 is 433338079166.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661970833333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165492708332 + ... + 165492708335.

It is an arithmetic number, because the mean of its divisors is an integer number (248239062501).

Almost surely, 2^661970833334 is an apocalyptic number.

661970833334 is a deficient number, since it is larger than the sum of its proper divisors (330985416670).

661970833334 is a wasteful number, since it uses less digits than its factorization.

661970833334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330985416669.

The product of its (nonzero) digits is 5878656, while the sum is 53.

The spelling of 661970833334 in words is "six hundred sixty-one billion, nine hundred seventy million, eight hundred thirty-three thousand, three hundred thirty-four".