7661345 has 8 divisors (see below), whose sum is σ = 9211776. Its totient is φ = 6116976.

The previous prime is 7661333. The next prime is 7661347. The reversal of 7661345 is 5431667.

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

It is a cyclic number.

It is not a de Polignac number, because 7661345 - 2⁶ = 7661281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7661347) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2024 + ... + 4406.

It is an arithmetic number, because the mean of its divisors is an integer number (1151472).

Almost surely, 2^7661345 is an apocalyptic number.

It is an amenable number.

7661345 is a deficient number, since it is larger than the sum of its proper divisors (1550431).

7661345 is a wasteful number, since it uses less digits than its factorization.

7661345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031.

The product of its digits is 15120, while the sum is 32.

The square root of 7661345 is about 2767.9134740812. The cubic root of 7661345 is about 197.1370892532.

The spelling of 7661345 in words is "seven million, six hundred sixty-one thousand, three hundred forty-five".