345666157 has 4 divisors (see below), whose sum is σ = 345889440. Its totient is φ = 345442876.

The previous prime is 345666133. The next prime is 345666179. The reversal of 345666157 is 751666543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 345666157 - 2¹⁹ = 345141869 is a prime.

It is a super-3 number, since 3×345666157³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345666197) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109303 + ... + 112420.

It is an arithmetic number, because the mean of its divisors is an integer number (86472360).

Almost surely, 2^345666157 is an apocalyptic number.

It is an amenable number.

345666157 is a deficient number, since it is larger than the sum of its proper divisors (223283).

345666157 is a wasteful number, since it uses less digits than its factorization.

345666157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223282.

The product of its digits is 453600, while the sum is 43.

The square root of 345666157 is about 18592.0993166452. The cubic root of 345666157 is about 701.8090330737.

The spelling of 345666157 in words is "three hundred forty-five million, six hundred sixty-six thousand, one hundred fifty-seven".