6630037878491 has 4 divisors (see below), whose sum is σ = 6695681817984. Its totient is φ = 6564393939000.

The previous prime is 6630037878487. The next prime is 6630037878523. The reversal of 6630037878491 is 1948787300366.

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

It is a cyclic number.

It is not a de Polignac number, because 6630037878491 - 2² = 6630037878487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6630037808491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32821969595 + ... + 32821969796.

It is an arithmetic number, because the mean of its divisors is an integer number (1673920454496).

Almost surely, 2^{6630037878491} is an apocalyptic number.

6630037878491 is a deficient number, since it is larger than the sum of its proper divisors (65643939493).

6630037878491 is a wasteful number, since it uses less digits than its factorization.

6630037878491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65643939492.

The product of its (nonzero) digits is 36578304, while the sum is 62.

The spelling of 6630037878491 in words is "six trillion, six hundred thirty billion, thirty-seven million, eight hundred seventy-eight thousand, four hundred ninety-one".