667670554542 has 64 divisors (see below), whose sum is σ = 1349373634560. Its totient is φ = 220232707200.

The previous prime is 667670554541. The next prime is 667670554589. The reversal of 667670554542 is 245455076766.

667670554542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667670554541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311848792 + ... + 311850932.

It is an arithmetic number, because the mean of its divisors is an integer number (21083963040).

Almost surely, 2^667670554542 is an apocalyptic number.

667670554542 is an abundant number, since it is smaller than the sum of its proper divisors (681703080018).

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

667670554542 is a wasteful number, since it uses less digits than its factorization.

667670554542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609.

The product of its (nonzero) digits is 42336000, while the sum is 57.

The spelling of 667670554542 in words is "six hundred sixty-seven billion, six hundred seventy million, five hundred fifty-four thousand, five hundred forty-two".