661498353 has 16 divisors (see below), whose sum is σ = 998490240. Its totient is φ = 432677232.

The previous prime is 661498309. The next prime is 661498379. The reversal of 661498353 is 353894166.

It is not a de Polignac number, because 661498353 - 2¹² = 661494257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 661498299 and 661498308.

It is not an unprimeable number, because it can be changed into a prime (661498153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229701 + ... + 232562.

It is an arithmetic number, because the mean of its divisors is an integer number (62405640).

Almost surely, 2^661498353 is an apocalyptic number.

It is an amenable number.

661498353 is a deficient number, since it is larger than the sum of its proper divisors (336991887).

661498353 is a wasteful number, since it uses less digits than its factorization.

661498353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462325 (or 462319 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 661498353 is about 25719.6102808732. The cubic root of 661498353 is about 871.3171368994.

The spelling of 661498353 in words is "six hundred sixty-one million, four hundred ninety-eight thousand, three hundred fifty-three".