2666415251254 has 4 divisors (see below), whose sum is σ = 3999622876884. Its totient is φ = 1333207625626.

The previous prime is 2666415251251. The next prime is 2666415251329. The reversal of 2666415251254 is 4521525146662.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 2666415251198 and 2666415251207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2666415251251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 666603812812 + ... + 666603812815.

It is an arithmetic number, because the mean of its divisors is an integer number (999905719221).

Almost surely, 2^{2666415251254} is an apocalyptic number.

2666415251254 is a deficient number, since it is larger than the sum of its proper divisors (1333207625630).

2666415251254 is a wasteful number, since it uses less digits than its factorization.

2666415251254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333207625629.

The product of its digits is 3456000, while the sum is 49.

The spelling of 2666415251254 in words is "two trillion, six hundred sixty-six billion, four hundred fifteen million, two hundred fifty-one thousand, two hundred fifty-four".