661292423 has 16 divisors (see below), whose sum is σ = 747338400. Its totient is φ = 579626880.

The previous prime is 661292407. The next prime is 661292459. The reversal of 661292423 is 324292166.

661292423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 661292423 - 2⁴ = 661292407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (661292483) 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, 386093 + ... + 387801.

It is an arithmetic number, because the mean of its divisors is an integer number (46708650).

Almost surely, 2^661292423 is an apocalyptic number.

661292423 is a deficient number, since it is larger than the sum of its proper divisors (86045977).

661292423 is a wasteful number, since it uses less digits than its factorization.

661292423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962.

The product of its digits is 31104, while the sum is 35.

The square root of 661292423 is about 25715.6066037727. The cubic root of 661292423 is about 871.2267113981.

The spelling of 661292423 in words is "six hundred sixty-one million, two hundred ninety-two thousand, four hundred twenty-three".