661360498 has 4 divisors (see below), whose sum is σ = 992040750. Its totient is φ = 330680248.

The previous prime is 661360451. The next prime is 661360507. The reversal of 661360498 is 894063166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 894063166 = 2 ⋅447031583.

It can be written as a sum of positive squares in only one way, i.e., 536524569 + 124835929 = 23163^2 + 11173^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165340123 + ... + 165340126.

Almost surely, 2^661360498 is an apocalyptic number.

661360498 is a deficient number, since it is larger than the sum of its proper divisors (330680252).

661360498 is a wasteful number, since it uses less digits than its factorization.

661360498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330680251.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 661360498 is about 25716.9301822749. The cubic root of 661360498 is about 871.2566057490.

The spelling of 661360498 in words is "six hundred sixty-one million, three hundred sixty thousand, four hundred ninety-eight".