2661670 has 16 divisors (see below), whose sum is σ = 5226768. Its totient is φ = 967840.

The previous prime is 2661661. The next prime is 2661689. The reversal of 2661670 is 761662.

2661670 = T₃₂ + T₃₃ + ... + T₂₅₁.

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11989 + ... + 12208.

It is an arithmetic number, because the mean of its divisors is an integer number (326673).

2^2661670 is an apocalyptic number.

2661670 is a deficient number, since it is larger than the sum of its proper divisors (2565098).

2661670 is a wasteful number, since it uses less digits than its factorization.

2661670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24215.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 2661670 is about 1631.4625340473. The cubic root of 2661670 is about 138.5855883379.

It can be divided in two parts, 266 and 1670, that added together give a square (1936 = 44²).

The spelling of 2661670 in words is "two million, six hundred sixty-one thousand, six hundred seventy".