6660157078 has 4 divisors (see below), whose sum is σ = 9990235620. Its totient is φ = 3330078538.

The previous prime is 6660157069. The next prime is 6660157079. The reversal of 6660157078 is 8707510666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6660157079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1665039268 + ... + 1665039271.

It is an arithmetic number, because the mean of its divisors is an integer number (2497558905).

Almost surely, 2^6660157078 is an apocalyptic number.

6660157078 is a deficient number, since it is larger than the sum of its proper divisors (3330078542).

6660157078 is a wasteful number, since it uses less digits than its factorization.

6660157078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3330078541.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 6660157078 is about 81609.7854304249. The cubic root of 6660157078 is about 1881.4592825262.

The spelling of 6660157078 in words is "six billion, six hundred sixty million, one hundred fifty-seven thousand, seventy-eight".