667977061 has 8 divisors (see below), whose sum is σ = 672706944. Its totient is φ = 663258960.

The previous prime is 667977041. The next prime is 667977197. The reversal of 667977061 is 160779766.

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

It is a cyclic number.

It is not a de Polignac number, because 667977061 - 2²³ = 659588453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 667976996 and 667977014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667977001) 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, 132000 + ... + 136966.

It is an arithmetic number, because the mean of its divisors is an integer number (84088368).

Almost surely, 2^667977061 is an apocalyptic number.

It is an amenable number.

667977061 is a deficient number, since it is larger than the sum of its proper divisors (4729883).

667977061 is a wasteful number, since it uses less digits than its factorization.

667977061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5891.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 667977061 is about 25845.2521945521. The cubic root of 667977061 is about 874.1524575771.

The spelling of 667977061 in words is "six hundred sixty-seven million, nine hundred seventy-seven thousand, sixty-one".