660623743 has 4 divisors (see below), whose sum is σ = 711440968. Its totient is φ = 609806520.

The previous prime is 660623731. The next prime is 660623773. The reversal of 660623743 is 347326066.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 660623743 - 2⁹ = 660623231 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 (660623713) 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, 25408593 + ... + 25408618.

It is an arithmetic number, because the mean of its divisors is an integer number (177860242).

Almost surely, 2^660623743 is an apocalyptic number.

660623743 is a deficient number, since it is larger than the sum of its proper divisors (50817225).

660623743 is a wasteful number, since it uses less digits than its factorization.

660623743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50817224.

The product of its (nonzero) digits is 108864, while the sum is 37.

The square root of 660623743 is about 25702.6018721841. The cubic root of 660623743 is about 870.9329591802.

It can be divided in two parts, 660 and 623743, that added together give a triangular number (624403 = T₁₁₁₇).

The spelling of 660623743 in words is "six hundred sixty million, six hundred twenty-three thousand, seven hundred forty-three".