667795550 has 24 divisors (see below), whose sum is σ = 1243112400. Its totient is φ = 266900480.

The previous prime is 667795519. The next prime is 667795553. The reversal of 667795550 is 55597766.

It is a happy number.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667795553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65711 + ... + 75189.

It is an arithmetic number, because the mean of its divisors is an integer number (51796350).

Almost surely, 2^667795550 is an apocalyptic number.

667795550 is a deficient number, since it is larger than the sum of its proper divisors (575316850).

667795550 is a wasteful number, since it uses less digits than its factorization.

667795550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10900 (or 10895 counting only the distinct ones).

The product of its (nonzero) digits is 1984500, while the sum is 50.

The square root of 667795550 is about 25841.7404599613. The cubic root of 667795550 is about 874.0732718935.

The spelling of 667795550 in words is "six hundred sixty-seven million, seven hundred ninety-five thousand, five hundred fifty".