660473979 has 16 divisors (see below), whose sum is σ = 964932480. Its totient is φ = 398519360.

The previous prime is 660473971. The next prime is 660474019. The reversal of 660473979 is 979374066.

It is a cyclic number.

It is not a de Polignac number, because 660473979 - 2³ = 660473971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (660473971) 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, 36594 + ... + 51575.

It is an arithmetic number, because the mean of its divisors is an integer number (60308280).

Almost surely, 2^660473979 is an apocalyptic number.

660473979 is a deficient number, since it is larger than the sum of its proper divisors (304458501).

660473979 is a wasteful number, since it uses less digits than its factorization.

660473979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88410.

The product of its (nonzero) digits is 1714608, while the sum is 51.

The square root of 660473979 is about 25699.6883055029. The cubic root of 660473979 is about 870.8671404430.

The spelling of 660473979 in words is "six hundred sixty million, four hundred seventy-three thousand, nine hundred seventy-nine".