660948015 has 144 divisors (see below), whose sum is σ = 1414944288. Its totient is φ = 261660672.

The previous prime is 660948011. The next prime is 660948037. The reversal of 660948015 is 510849066.

660948015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 660948015 - 2² = 660948011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660948011) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 2111499 + ... + 2111811.

It is an arithmetic number, because the mean of its divisors is an integer number (9826002).

Almost surely, 2^660948015 is an apocalyptic number.

660948015 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

660948015 is an abundant number, since it is smaller than the sum of its proper divisors (753996273).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

660948015 is a wasteful number, since it uses less digits than its factorization.

660948015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 358 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 660948015 is about 25708.9092534086. The cubic root of 660948015 is about 871.0754371434.

The spelling of 660948015 in words is "six hundred sixty million, nine hundred forty-eight thousand, fifteen".