667252020 has 24 divisors (see below), whose sum is σ = 1868305824. Its totient is φ = 177933856.

The previous prime is 667251983. The next prime is 667252087. The reversal of 667252020 is 20252766.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5560374 + ... + 5560493.

It is an arithmetic number, because the mean of its divisors is an integer number (77846076).

Almost surely, 2^667252020 is an apocalyptic number.

667252020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

667252020 is an abundant number, since it is smaller than the sum of its proper divisors (1201053804).

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

667252020 is a wasteful number, since it uses less digits than its factorization.

667252020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120879 (or 11120877 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 667252020 is about 25831.2218061787. The cubic root of 667252020 is about 873.8360665607.

The spelling of 667252020 in words is "six hundred sixty-seven million, two hundred fifty-two thousand, twenty".