661354757314 has 4 divisors (see below), whose sum is σ = 992032135974. Its totient is φ = 330677378656.

The previous prime is 661354757267. The next prime is 661354757321. The reversal of 661354757314 is 413757453166.

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

It can be written as a sum of positive squares in only one way, i.e., 660408149025 + 946608289 = 812655^2 + 30767^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165338689327 + ... + 165338689330.

Almost surely, 2^661354757314 is an apocalyptic number.

661354757314 is a deficient number, since it is larger than the sum of its proper divisors (330677378660).

661354757314 is a wasteful number, since it uses less digits than its factorization.

661354757314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330677378659.

The product of its digits is 6350400, while the sum is 52.

The spelling of 661354757314 in words is "six hundred sixty-one billion, three hundred fifty-four million, seven hundred fifty-seven thousand, three hundred fourteen".