667650015554 has 4 divisors (see below), whose sum is σ = 1001475023334. Its totient is φ = 333825007776.

The previous prime is 667650015551. The next prime is 667650015583. The reversal of 667650015554 is 455510056766.

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

It can be written as a sum of positive squares in only one way, i.e., 401419814929 + 266230200625 = 633577^2 + 515975^2 .

It is not an unprimeable number, because it can be changed into a prime (667650015551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166912503887 + ... + 166912503890.

Almost surely, 2^667650015554 is an apocalyptic number.

667650015554 is a deficient number, since it is larger than the sum of its proper divisors (333825007780).

667650015554 is a wasteful number, since it uses less digits than its factorization.

667650015554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333825007779.

The product of its (nonzero) digits is 3780000, while the sum is 50.

The spelling of 667650015554 in words is "six hundred sixty-seven billion, six hundred fifty million, fifteen thousand, five hundred fifty-four".