667687011 has 8 divisors (see below), whose sum is σ = 905338560. Its totient is φ = 437580072.

The previous prime is 667686983. The next prime is 667687049. The reversal of 667687011 is 110786766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 667687011 - 2⁶ = 667686947 is a prime.

It is a super-2 number, since 2×667687011² = 891611889316228242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (667687061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1885945 + ... + 1886298.

It is an arithmetic number, because the mean of its divisors is an integer number (113167320).

Almost surely, 2^667687011 is an apocalyptic number.

667687011 is a deficient number, since it is larger than the sum of its proper divisors (237651549).

667687011 is a wasteful number, since it uses less digits than its factorization.

667687011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3772305.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 667687011 is about 25839.6403032240. The cubic root of 667687011 is about 874.0259139962.

The spelling of 667687011 in words is "six hundred sixty-seven million, six hundred eighty-seven thousand, eleven".