661740335 has 8 divisors (see below), whose sum is σ = 795615696. Its totient is φ = 528374080.

The previous prime is 661740329. The next prime is 661740347. The reversal of 661740335 is 533047166.

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

It is not a de Polignac number, because 661740335 - 2¹⁰ = 661739311 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 661740295 and 661740304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124409 + ... + 129618.

It is an arithmetic number, because the mean of its divisors is an integer number (99451962).

Almost surely, 2^661740335 is an apocalyptic number.

661740335 is a deficient number, since it is larger than the sum of its proper divisors (133875361).

661740335 is a wasteful number, since it uses less digits than its factorization.

661740335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254553.

The product of its (nonzero) digits is 45360, while the sum is 35.

The square root of 661740335 is about 25724.3140822064. The cubic root of 661740335 is about 871.4233691413.

The spelling of 661740335 in words is "six hundred sixty-one million, seven hundred forty thousand, three hundred thirty-five".