661414 has 8 divisors (see below), whose sum is σ = 1068480. Its totient is φ = 305256.

The previous prime is 661393. The next prime is 661417. The reversal of 661414 is 414166.

661414 = T₃₂₆ + T₃₂₇ + ... + T₃₃₇.

661414 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×661414³ = 868043330493677832, which contains 333 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661417) 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, 12694 + ... + 12745.

It is an arithmetic number, because the mean of its divisors is an integer number (133560).

2⁶⁶¹⁴¹⁴ is an apocalyptic number.

661414 is a deficient number, since it is larger than the sum of its proper divisors (407066).

661414 is a wasteful number, since it uses less digits than its factorization.

661414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25454.

The product of its digits is 576, while the sum is 22.

The square root of 661414 is about 813.2736316886. The cubic root of 661414 is about 87.1280099096.

The spelling of 661414 in words is "six hundred sixty-one thousand, four hundred fourteen".